Malicious PDF — malware analysis report

Static analysis result for SHA-256 74544f09c146bc93…

MALICIOUS

PDF

93.4 KB Created: 2021-06-26 03:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6eea48ef000b10597f81e690ace05957 SHA-1: 1f8813a38b44b292a6b0bf25d2eb9d1cbacf5506 SHA-256: 74544f09c146bc93ea0ddd7c2960f12f39d992dccdc977da6513dde1cb0549ca
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1598.003 Subdomain Acquisition

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting it's a link farm designed to redirect users to malicious sites. The presence of a callback lure indicates a potential tech support scam or further phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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.
  • 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://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/af8a87cf362964f0d2eb8ff3463b9eb4/magibenagivatafisisole.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/8a7c9861d8a43030ee8724d626e9341b/jexiropupalajupa.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/d8127c66d25023786a4a0c3e8b9170a4/29047671523.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/kr561g234volif91qtqdla9aog/zuporitivonokuwavizar.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/b25c1914f475e3eebff5d68cb4b3f30b/69644968790.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/ficku1tlo3m48mfpf1r8ioetr7/97025536799.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1aa784a4e5---wemebezitokos.pdf
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/eff32f2bdcb589bbf723ac36784c7753/gonipotazow.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/i20u0q0v29a5u5qihbcvmiasj8/vigofiminokoravatirobumox.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/jcrjmnrvhgj8qvernnisntdgv8/24195628920.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6917cb2dd3---95769485304.pdf
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/4590531e6472bb6cb0cb5cfc91f7f600/zajomaduxunatabivoges.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc1c7acc73---70759609402.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/1f3bcd2a159dd6747233d2f8b5feb1b1/50187627271.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/nkd2cv549mvjehcq88iofmm1g0/42903523323.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081b6ecc65da---88362839535.pdf
    • https://iqmuseum.mn/uploads/files/66201912384.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716f919945a.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0aac72444---10144513715.pdf
    • http://runo34.ru/attachments/file/gaxejumonizupifuwi.pdf
    • http://dabaizhongxue.com/upload_fck/file/2021-5-16/20210516182355339919.pdf
    • https://tidaksusah.com/contents//files/lorokudinapubidolo.pdf
    • http://ehomeforeclosure.org/images/file/zofofezekisasik.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//linul.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=have+gotten+or+have+got
    • 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_off00010a4f.bin
7f79af56351d84e35390e747aaf2a0a7c03b2e81b54c7d580be6b8c9fbf00249
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4F 18096 bytes
font_01_sfnt_off000139c4.bin
ad5675a18424414017a3dfbd27dddac7c9faed0f1d0214d61599dee8fab974d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x139C4 10140 bytes
font_02_sfnt_off00015054.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15054 16792 bytes