Malicious PDF — malware analysis report

Static analysis result for SHA-256 61f2ea14fcc52478…

MALICIOUS

PDF

99.0 KB Created: 2021-09-07 11:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: da405146a5ea4a69ebc3d6892e11fcff SHA-1: 2a0ba7026c013834e2dce08c17cce0858a3d69ca SHA-256: 61f2ea14fcc52478ca359731a131d99a94ad151cea31c684b01dcf5b43ca4e7f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as 'Pdf.Phishing.Trojan'. It contains an embedded JavaScript stream and numerous URLs pointing to potentially compromised WordPress sites and disposable hosting, suggesting it's part of a phishing or malware distribution campaign. The presence of a 'Callback phishing phone lure' heuristic further supports a social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://gikguamerica.com/userfiles/file/79982893602.pdf In PDF document text
    • https://letstravelforacause.com/miet/assets/files/21449614597.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d57080bb830---91840409838.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/39680716349.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/dowavepawaxomemidam.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/64367618969.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16128d67005023---zedobe.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/wolajaxusa.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/99913879255.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/79229498821.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/zavasegesoxuve.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/51132210669.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/80066074141.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/seboz.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/021448475320.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611093335299a---kebisarigavekijowifezevo.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/66125580453.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16097b51290914---31088004433.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/wudobunawigijodiledo.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608514464047b---36405340455.pdfIn PDF document text
    • http://garagehayashi.com/js/upload/files/kitipazotofijufijase.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/73793824444.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a31fd1cbf56---83373926158.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16081328fe4884---fekil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=composition+of+functions+worksheet+keyPDF 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_off0001191b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191B 19492 bytes
SHA-256: 6e1f0dd53f53985bd93d2bbc00f26f1118b95af555156b54acce94b49d794f25
font_01_sfnt_off00014c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000164a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164A9 10960 bytes
SHA-256: f6ebd0a4682659f9cecbef9841faaf45533d10dbd83b01c2f2d5c1eb0f229441

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