Malicious PDF — malware analysis report

Static analysis result for SHA-256 f29af679ef4e61c1…

MALICIOUS

PDF

87.3 KB Created: 2021-07-22 15:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 75a1a20fd373e6a0d2fe39ff4ae225d5 SHA-1: 5cf77da6bbcf5d87c59160267977b36a86ae89fe SHA-256: f29af679ef4e61c1c602c547a1afd4c2214582c25f02006dde3d40eb44f45fc2
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is flagged as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous links to external PDFs hosted on compromised websites, suggesting an attempt to redirect users to malicious content. The presence of 'payment redirection' and 'invoice' lures further supports the conclusion that this document is designed to deceive users into fraudulent financial transactions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/k6udt5cmdk1f58eh0p4s9smgb4/zerogiregeruvenegejarexov.pdf In PDF document text
    • http://canhtoanland.com/upload/files/30223880709.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/kv2ikk7aur7mm2rk6jr06ms16f/busejolibi.pdfIn macro / runtime command snippet
    • https://delcinfo.ru/img/files/files/jibimevisapilemupuzilagib.pdfIn PDF document text
    • https://bdsvieclam.com/upload/files/kepuxavuvopukale.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c73065b8592---71576631913.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/3a5b1c9f79ff797be48233596ba2d8b0/87706268543.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080d81d6f5eb---lowegakixuvapagu.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f41dd257d---83551072440.pdfIn PDF document text
    • https://avayemehr-carpet.ir/data/file/75719817293.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0240b99785---9438894993.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/60962563520.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082d2313702b---jatudidukipiwufobene.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/7d9cdaa2251241a76ed129bf79cf4c78/87770440091.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/gijubatiwoxaruwezafe.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/30029808057.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/3063637378.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/16026478593.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/48352788217.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160845616cf830---19385109151.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607bba05833b2---popigunotan.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0da30628b---27408362545.pdfIn PDF document text
    • https://jnvhardoi.org/ckfinder/userfiles/files/54314519487.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=post+office+account+opening+form+samplePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26F 10924 bytes
SHA-256: 4b55b0bae0cc7423eeb4d07d6fe1d766bf5c0e1c1f8d89fcca626f3918f0ed34
font_01_sfnt_off00010bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC5 16868 bytes
SHA-256: f00cb1e7ea4ccdd90f9d06c1954d00f73df33fcba6dbdfdfb27ef127dcdaeeb2
font_02_sfnt_off0001378e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1378E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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