Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea17199e5a24fff…

MALICIOUS

PDF

90.0 KB Created: 2021-07-24 06:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a89edceb51933a5d6026c0db64a7f54a SHA-1: 0270158cdf0880cba038f4091b07b020a1baa12c SHA-256: cea17199e5a24fffe6f5b531bc805cbb3f3d97ce6ef7039c63ec71792857e75c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate this is a link farm, a common tactic for phishing or distributing further malware. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • 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.
  • 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://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/35a60d273b9a2bae5652ad733353b58a/tasefubuxelukawotusirusu.pdf In PDF document text
    • https://fasaac.org/temp//files/95056319414.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/c5304e088df6c141a07c5d4fc9f4ce52/domogop.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/ronewanifemokatidebum.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160948b0f674a6---78947878618.pdfIn PDF document text
    • http://broadmoor80.com/clients/866172/File/97066339997.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/cc10142ffde5893880424b0a4dd6c25c/jajuvagidovamixusetap.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1d9b513275---78380849205.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/0t8algo4meae8d7dqb48cjoeja/7003826081.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c37c8262661---dujazewuginofuro.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/puxaxo.pdfIn PDF document text
    • https://francemonde.news/UserFiles/file/deviburipafikaxup.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/mojolelido.pdfIn PDF document text
    • http://saipanbooking.com/FileData/ckfinder/files/20210704_0938ACE0F76C4630.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b030541ea---pogodewujadamixe.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c9ad92233---5023960458.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/bawugesutikozesajefi.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/dafetupedisetewijar.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/ea0788ec6ee06bdead53ddf8a8c3da18/dawonesajiwotavabopedifo.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc1c33a93c---meninikumutilazenesibe.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/fae471e40c42f450e5f82821982c0647/83867138454.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b83a7628bbe---9062837496.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=can+i+look+up+accident+reportsPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/41c96efd5cca267fd2e209eeef446166/jifatelaxuz.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE3 17108 bytes
SHA-256: 0e6a7ad3ccba2c4efbf7050838eef7ddd6d000845cb98e9434068fa226010f3f
font_01_sfnt_off000128b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000140cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140CC 10728 bytes
SHA-256: 0380b2e0ff6509ed93d0867a785cc0fb19f45064e1b143ffd7f894fe01ed3eda

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