Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b358df75999aa94…

MALICIOUS

PDF

80.2 KB Created: 2021-06-27 21:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 738b63713800c0926927f0d0f8a72ae8 SHA-1: 2ca99e686b13e4156fa0cb3755e32f61b5217393 SHA-256: 0b358df75999aa94b2624264b38d87a14b10be2c9df70b40f58b0130cc27b02b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute malicious content. Although no executable scripts were extracted, the presence of embedded URLs and the 'SE_CALLBACK_LURE' heuristic indicate a phishing or scam attempt, likely to trick the user into a fraudulent phone interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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) or Microsoft license-boilerplate 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://autotrans911.com/thread/admin/uploads/file/tolopawaxat.pdf In PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160945123261e1---legunisamagazikomi.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/46804923046.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0382e918d---88934004594.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/98b16ac19f2aeecafff492645301a8c7/12811285196.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608db94cd1e51---lixesikowovebebat.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/mofujafebadurutirawiketu.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/rvf7e6ttdvsd1tqm3c9j3gd958/memobaz.pdfIn PDF document text
    • http://raczcsalad.hu/files/xijedakaper.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fab7d3f2d---zonukedivizu.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/52313321345.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/cad0fade562b1b92e515e206723de7a3/vojopemizaro.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/97548286546.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a75dd7eb341---33887609459.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/b092554d1108a73c708bfcd45dfc5678/jasuzetowaruvovemoteris.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efe1e0d240---xepamejotilerigisemujur.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2b171f184---pupazajiputup.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/34340971485.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ejb1v4mik6t9eca3cf15imqvt0/kafefawitolu.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b08a1ddffe9---53670749452.pdfIn PDF document text
    • http://moscowprice.com/content/xuploadimages/file/42839105962.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/7e3ca9edb03b672dbc734b464c61925a/rumavofe.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609839c5a09cb---joranebutix.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/84575434460.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=living+environment+regents+reviewPDF 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_off0000d508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD508 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1A 17292 bytes
SHA-256: 9800b627939e86cf5130df874a491c0571b8eed79d751a84da86529d566e0cff
font_02_sfnt_off00011a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A78 10352 bytes
SHA-256: 42ae291a0092653938b0648007f19b17e6f4a488082d4d47b8182fa3d3e12342

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