Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0228758291d946…

MALICIOUS

PDF

88.5 KB Created: 2021-08-13 15:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e16b768d715d0f1647a811b06f69c490 SHA-1: 8c377a1282713cf9eb6fc9bfaab88f2e15c07577 SHA-256: 6e0228758291d946751c2af6a96e70907518a7cb2f48a66f1080f532cad74dab
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document exhibits characteristics of a callback phishing or tech-support scam by presenting a lure that prompts the user to call a phone number. The presence of numerous external URIs, many pointing to compromised WordPress sites, suggests the document is part of a larger phishing infrastructure designed to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://queure.ru/uplcv?utm_term=why+has+my+dyson+stopped+working
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a3723951b---51746638457.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a837ac773e8---tekup.pdf
    • http://vintageguitar.ru/ckfinder/userfiles/files/67315501626.pdf
    • http://xn--o79av69abka850ab6c.com/upload/file/202107020828029812.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/3d993197f1272268f98af8681f6dd48b/jegolura.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/16107ff33b06d3---62940233938.pdf
    • http://anandtouristcorporation.com/uploads/sugawoduragova.pdf
    • http://activesolutionelectric.com/images/file/pikelibowusoxosimomuwowok.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087b32e7aee7---zemeloxanipupotitid.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b56b01d2a05---ritugifubovagamulesase.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/e61a1329a43cf4612300678176a94606/ruremarud.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b85ebef4e---99613770102.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1bd8683f9---jajigilena.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/l6m4ggoahbn14v3ehqacq8c624/34691114299.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/bdca41d70ff5b9a2c3e6e1de55a267db/ribojewexekanukog.pdf
    • https://sportsslife.net/upload/ckfinder/files/pesemaxotatovog.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/1hg8s4luhrr2pdfejki4t6pt4d/dabidilese.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/932d600673dd50153c999849d355caaa/58790779044.pdf
    • http://dansecyr.ca/pdf/file/kebituzevix.pdf
    • http://royalwedding.jp/images/blog//file/guvomuseropanaguduwi.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/52fa34361b6cb5b057ed257624bf9b3e/digegukosagakuri.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/2ad634679dc22339eac4c53f58046c45/xepusivufoxemudamaw.pdf
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/efdbee90c3f3e75603c12e28ea3d3597/lasarukinirodemum.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dae4ab3c5---30955843720.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092c0924f1f4---bugonal.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f579.bin
675f581ce2fa8a3808943feb71b8dc62e5970ce1381a0560fa6a5d92c61eab1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF579 11076 bytes
font_01_sfnt_off00010efb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFB 16792 bytes
font_02_sfnt_off0001270d.bin
1633790496ccc579c0f61e4db4418d9821e83636ec53c1e1fb7ae3e3c8816d75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1270D 17252 bytes

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