Malicious PDF — malware analysis report

Static analysis result for SHA-256 413527a80958d7c8…

MALICIOUS

PDF

68.1 KB Created: 2021-09-28 05:09:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 00f52d22df6fe18689deec8cf2898d43 SHA-1: 283d72201f4a5754be3ddb6b697e5927ebb1cfac SHA-256: 413527a80958d7c8710620159a467e9dc6b2e33000965a2c28cf0f56e89e7ea6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a fraudulent phone number, likely for a tech-support scam or billing fraud. While no scripts were extracted, the PDF structure and embedded links suggest it may exploit vulnerabilities or redirect to malicious sites to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/e7f5a1e748cb8b9cc3780ed51421342f/59527721237.pdf In PDF document text
    • http://boldino-hotel.com/ckfinder/userfiles/files/sazuteves.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/didilogitepexu.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/megavonew.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e617b1c71---56385792856.pdfIn PDF document text
    • http://formacio.fic.cat/uploads/file/86464825397.pdfIn PDF document text
    • http://techbis.pl/files/file/69211096879.pdfIn PDF document text
    • https://digireg.nz/upload/ninomawonoxovegigalin.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/62359454600.pdfIn PDF document text
    • https://sproname.com/files/userfiles/files/zajuxekaxebefe.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/45878694703.pdfIn PDF document text
    • http://esteel.my/userfiles/file/56222064960.pdfIn PDF document text
    • http://www.biogreeno.com/cms/ckfinder/userfiles/files/pagitukukiwawivojugiwasaz.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/62953335747.pdfIn PDF document text
    • http://vansuloi.com/uploads/userfiles/file/19832002000.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/48276595243.pdfIn PDF document text
    • http://tabouligrill.com/ckfinder/userfiles/files/monarenobederikiwaza.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/nozewirajebuviwon.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/p42nig5ld0jh1kahqv05r4t8a3/25598147717.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/3bed9085083fef42cf5fb88c73ed4c9f/75624641202.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613316a5a45e0---jezatewuxi.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/3bipt3b05080qcjl2en4q268u5/xoxolunawolefagejudimeju.pdfIn PDF document text
    • https://lesura.net/userfiles/file/32942255633.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=phone+noise+cancellation+androidPDF 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_off0000aea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B2 14832 bytes
SHA-256: 8cf7ae2002475d6c1107c56ebd4f86cd0144808d31df8e774e14c1dd9ec4867a
font_02_sfnt_off0000eb4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4B 10468 bytes
SHA-256: 4b2260df6ea938c97f22b117547ca8665bd8b99908f57cdaaf32ca8dfd6d514f

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