Malicious PDF — malware analysis report

Static analysis result for SHA-256 c75cbf731560af40…

MALICIOUS

PDF

85.9 KB Created: 2021-09-04 00:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9dfa6d48cd6b43926f047c189402ef1a SHA-1: a8e09626dcbf1adad9d1b15849f93ca5da7e8b9f SHA-256: c75cbf731560af40397b686885ea24603464dd6b089f47d8440a78f2207e8853
196 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' and an ML classifier indicating maliciousness. The 'SE_MFA_LURE' heuristic strongly suggests the document's purpose is to trick users into approving multi-factor authentication requests or providing one-time codes, a common credential harvesting technique. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or credential theft attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160a58ef436085---lozatakusuj.pdf In PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/mujabilutipurigibetoboxof.pdfIn PDF document text
    • http://altinay-law.com/images/file/16642364955.pdfIn PDF document text
    • http://xaydunglenguyen.vn/upload/files/0fac7c.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/82920888405.pdfIn PDF document text
    • http://www.astmalek.cz/obrazky/file/73788109917.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/769896daab5824d717efe98f298d5c78/75246889070.pdfIn PDF document text
    • http://abwsalisbury.com/uploads/files/bejedalipido.pdfIn PDF document text
    • http://www.enfersalus.com/ckfinder/userfiles/files/kopumiwuxowef.pdfIn PDF document text
    • https://travelone.ae/userfiles/files/2933138721.pdfIn PDF document text
    • http://myboydfamily.com/clients/7/7f/7f513a2250c12de81a70a6735749c289/File/28541422207.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/8b542f872f0c9e815e0c0d8cf3f82f24/94130246758.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e7a8d50ad---82366024008.pdfIn PDF document text
    • http://carbonelite.ru/file/48990582469.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/63689d90315229f557c3c1a9814680fa/68993012324.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/98741625462.pdfIn PDF document text
    • http://polesprogettazioni.com/userfiles/files/rakovogopinekukigem.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/5573758923.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160e0e61ad10f0---35923644795.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/pavedagi.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5b9dbb8f3---78900966104.pdfIn PDF document text
    • http://nitecoreromania.ro/files/file/66559187179.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=scythe+choten+manualPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE945 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001015c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015C 10424 bytes
SHA-256: 14c62eda7538fbece92b79db97ef04ee249b78f8a6663939cfc01154364aadd4
font_02_sfnt_off000118e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E1 18812 bytes
SHA-256: 51529c763dd35ccc6bf43016aa32a6013dae9ee2340fc428fa0169fb8a2607ee

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