Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad568e8bfe4382f3…

MALICIOUS

PDF

84.1 KB Created: 2021-09-10 05:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2dad2c9d4aed7310c27792e426c4633f SHA-1: 6fb8e0c6cc5098c4ebc055f260d2d3362d935fbd SHA-256: ad568e8bfe4382f31a914cb6f1484d8db57ea397c0bb9e7177690acdbae08414
196 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, indicative of a link farm. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the document's purpose is to trick users into believing there are new payment instructions, a common tactic in business email compromise attacks. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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
  • 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.
  • 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://univerosg.com/ckfinder/userfiles/files/kazezatijekinofo.pdf In PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/79931884514.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/magevoji.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/5dbd97331e205e1be44995ba9df4c09d/peduja.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/36360924225.pdfIn PDF document text
    • http://dr-temt.ru/images/file/6511416635.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/buxuxanixugomarivixoxol.pdfIn PDF document text
    • https://vaitinhdien.com/app/webroot/upload/files/41151356832.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/886def9457d485b48caf9693d37a1e0a/fiwojareribaf.pdfIn PDF document text
    • http://nattuvaartha.com/assets/ckfinder/core/connector/php/uploads/files/jutuxodekiwo.pdfIn PDF document text
    • http://royalwedding.jp/images/blog/file/komapiziwujugunotenoxobof.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/2hcq34bndtr74hfa5bu9s57fgf/zisamukudezumaj.pdfIn PDF document text
    • http://www.fuchingrading.com/upload/file/34177776100.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/50121735293.pdfIn PDF document text
    • https://sambelteri.com/contents/files/89086991510.pdfIn PDF document text
    • http://finchamauto.com/pics/10932622294.pdfIn PDF document text
    • http://lepal.sk/ckfinder/userfiles/files/21525365305.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/22666372668.pdfIn PDF document text
    • http://redeyeldn.com/userfiles/file/61117376327.pdfIn PDF document text
    • http://dc-07b6a75bc4d0.breakthrough-physical-therapy.com/userfiles/files/60954646205.pdfIn PDF document text
    • http://sevvalturizm.com/rsm/files/pabixumejo.pdfIn PDF document text
    • https://swapnauraan.com/ckfinder/userfiles/files/53564132402.pdfIn PDF document text
    • http://soles2walk.cz/data/file/83692346594.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/motavine.pdfIn PDF document text
    • https://www.weboonline.com/ckfinder/userfiles/files/xaragumumogunusula.pdfIn PDF document text
    • http://www.klimavill.com/data/editorfile/dejigurerudelegitene.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613abbeed8f22---vagojiwomawugaxu.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/50769786539.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+do+i+sync+google+calendar+with+android+phonePDF 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_off0000e34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB60 17928 bytes
SHA-256: 7b7b5e5cb88275e84db200e86a84a9072e7e8639efc84e3953265265d0d63d5b
font_02_sfnt_off00012948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12948 10984 bytes
SHA-256: f5c2be3d64058f287876da78bbabe154dd88493650d2cba5a4b24862f5753a1c

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