Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d3a72545b278d1…

MALICIOUS

PDF

70.1 KB Created: 2021-10-02 15:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1a26cde8f7ca300c80323a21ecbbc9eb SHA-1: 96c7e3141be15f0faf388023df0888d0ac548d13 SHA-256: 01d3a72545b278d131824de72be761f47a40853492fffc300e764cc74d3114d4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external links, some of which are hosted on domains associated with link farms. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to prompt the user to make a phone call, consistent with callback phishing or tech-support scams. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • 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://vgcanada.com/userfiles/file/5313347887.pdf In PDF document text
    • http://cybernet.asia/UserFiles/File/mizave.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/48176591985.pdfIn PDF document text
    • http://babyindex.nl/images/uploads/melimeneki.pdfIn PDF document text
    • https://xn----7sbeo1acdy3adh.xn--p1ai/userfiles/file/lotetovagezokodukej.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/5517c0b70e37ee10afd031ad457fdb06/94811421563.pdfIn PDF document text
    • http://lynxauto.ru/userfiles/file/80525977477.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/pedopenofubalibezi.pdfIn PDF document text
    • https://rheinfurth.de/userfiles/file/zovafujiru.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/mewugesupujax.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/14963704872.pdfIn PDF document text
    • https://unifor975.ca/userfiles/file/zudepe.pdfIn PDF document text
    • http://epicridesnepal.com/files/bokobumofisa.pdfIn PDF document text
    • https://net-mex.hu/ckfinder/userfiles/files/fixatoj.pdfIn PDF document text
    • https://curvy.tw/upload/files/16437166510.pdfIn PDF document text
    • http://francescofesta.it/userfiles/files/labimukifa.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16143cfdf89242---duzirep.pdfIn PDF document text
    • https://aaaxxion.info/images/file/gemosixuraduxanidi.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/tigufe.pdfIn PDF document text
    • https://franchise-vietnam.com/app/webroot/img/files/31975440960.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/55403843272.pdfIn PDF document text
    • http://sportingfoundation.com/uploads/file/fufibaw.pdfIn PDF document text
    • http://wsospice.org/uploads/userfiles/file/file/nezazofodilejafa.pdfIn PDF document text
    • http://riviera.az/userfiles/file/kamitelakajeletok.pdfIn PDF document text
    • https://pedrazzini-legal.ch/UserFiles/File/dusupiputaxamujiwuvasiro.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210928_666325D96EEAA212.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=sample+resume+if+you+never+had+a+jobPDF 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_off0000b424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB424 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC3B 11288 bytes
SHA-256: 346582574f9b8a1f43d758a23f77f57ba9990e7dea738df6ffab43499ac45f2c
font_02_sfnt_off0000e633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE633 14332 bytes
SHA-256: 0cbd50719b5437d526772b654be187aabac9742beef451f9e8684e428ef2bcc9