Malicious PDF — malware analysis report

Static analysis result for SHA-256 a75ddf0bfb505c44…

MALICIOUS

PDF

118.8 KB Created: 2021-07-02 17:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a191a805c2bf55fb628900217221fbcd SHA-1: bd25d92e7f8c22e889d8b025d7070cafaa782023 SHA-256: a75ddf0bfb505c44c7d104c799fdd2b223caaab691f0959ffe270e435769e9a6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. The SE_CALLBACK_LURE heuristic indicates the document's content is designed to trick users into calling a phone number, consistent with phishing or tech-support scams. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it acts as a lure to potentially malicious sites or services.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9858

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://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/b6ac4c83dfa00fae5555100913fb9794/meritizij.pdf In PDF document text
    • http://almoheetmanpower.com/public_html/userfiles/file/31125765984.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/wojumejegugilorikufa.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/luxukiwitazofofiwitufur.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ee79969aa---68250760037.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9abd17fcaf---wewelewigewadugeka.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/96716341529.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16086ef07e3e2d---11755525742.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609472925a58b---16401766524.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/bomik.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/68fd1be250887891d38736d43e06d7b6/gogefoxazodivafimorexo.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/e12225e349573bcd7807485e70f9f715/67052372151.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/03878449e8d4ceda90efebddfcc59ff2/lusajadupofexojakaxog.pdfIn PDF document text
    • https://campermagazine.tv/public/file/25865467412.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d22deba6a16---55291026824.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160932150658b5---pasat.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071deadc2439---tabaliza.pdfIn PDF document text
    • https://pestresolution.pt/site/upload/file/23959692176.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd0ab2f854---89046112138.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c030413cf26---61324378725.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/nesavorefutoji.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160815edbe0a4f---23013073071.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/foev0vipfku2d8l2qh3jl1prg7/wilanarewodorebuwidaxuted.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/nikege.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/jerowuxaparalemexevixave.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/7sh67ecb1cvdekfp36s2c18rt6/89979814645.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=9+to+5+lily+tomlinPDF 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_off0001705e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1705E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18870 17824 bytes
SHA-256: 3460f84a909dc33e5527583284d9653be46a420fe4b34cbefa961b8633c51b4a
font_02_sfnt_off0001b7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B7A7 10024 bytes
SHA-256: f475678f5d9bd06020eb0facfa6ecad352b5f26910f11f94ed8df184786f0ea5

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