Malicious PDF — malware analysis report

Static analysis result for SHA-256 6721180a67f2057d…

MALICIOUS

PDF

88.8 KB Created: 2021-07-13 23:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7ad9b920f87eee8628c08a58c78b621d SHA-1: 8a59e4138ddaabbcc54af3b9119d62b68288e909 SHA-256: 6721180a67f2057d18752c323abf73aeb5167459924f700b7665051b271b12c5
164 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites, many of which host PDF files within common plugin upload directories, suggesting a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/uplcv?utm_term=what+is+bin+picking PDF link annotation
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/67831je2onafscjsords0tkt2g/mubukekusiparara.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/varofaw.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/27351057714.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/10899398563.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/1ba3240868e4dd2ddcc0463d666fa2d6/damupi.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/42e307a2e8ac423659e8ff374beffa01/76393998149.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160afa2fee0efe---fekadufazarupadunelid.pdfIn PDF document text
    • http://come2menorca.com/images/file/jopulupofexa.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/mopumij.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/7jdk0u06llc3sbp7mgnjqr37fb/talabajona.pdfIn PDF document text
    • http://slp70.com/clients/873855/File/15354452014.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608b85b49478c---9789728732.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/vologoxezaro.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/02nc1030ungb0i7ktd2a4fgos1/62906493225.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/jixenigidejibog.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6905ebe04---rifuruxegavoweril.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/vc9vs622s9dft9dcq1b19nf0d6/24798792649.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/575c43be57cd5ed9b75c9f2b8e32057d/17015003272.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/488213131b9e867299e1c70b130da5aa/fezifu.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/jamifo.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/286891d2dc2264522cfb62f7d8884574/xenireduvidivere.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/8ab4e4e1d821de0dde1e98e69a6411ce/48540734341.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/16724167691.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/e2ecb938529f6a8cc98c4f512a2e0a5a/23851563858.pdfIn PDF document text
    • 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_off0000f8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BB 10480 bytes
SHA-256: 6d0e4fb66e7e0c2c3975a598bd79cf713f3e9e3bdc0736ce14f94a83ab09256e
font_01_sfnt_off0001104c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104C 17540 bytes
SHA-256: 51525c5908f637e80db19251f98a1fd78ce2cf4c1e239baecc0859320d256523
font_02_sfnt_off00013e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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