Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb2fa415b2d7efe…

MALICIOUS

PDF

93.4 KB Created: 2021-04-09 04:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b000676364c25a9f7d086e02bf1650e SHA-1: 7ef22ab9fe78742b5c042391ca1c9ddb11a38793 SHA-256: adb2fa415b2d7efedf63931f2f7ef6dae09c6ae6fd71df249f154dd1e2a6c1e3
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. It contains a large number of external links, many of which point to unknown or potentially malicious domains, suggesting a link farm or phishing campaign. The embedded URLs and the PDF's structure are indicative of an attempt to manipulate search engine results or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=how+many+zones+nj+transit+bus
    • http://texifudosino.mygamesonline.org/celebrity_definition.pdf
    • http://sowoxapexemex.sportsontheweb.net/all_idioms_and_phrases_with_meanings_and_examples.pdf
    • https://cdn-cms.f-static.net/uploads/4463298/normal_5fd944d91bf44.pdf
    • http://fodelogutejamit.getenjoyment.net/assembler_plusieurs_foxit.pdf
    • https://gemitipob.weebly.com/uploads/1/3/4/4/134474898/musip.pdf
    • https://jononosafopobof.weebly.com/uploads/1/3/4/6/134649788/6022385.pdf
    • https://static.s123-cdn-static.com/uploads/4369915/normal_5fce41f921ced.pdf
    • https://cdn-cms.f-static.net/uploads/4489244/normal_601e4f988d684.pdf
    • https://topazezinin.weebly.com/uploads/1/3/0/9/130969714/cd126e68f58dd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://9e0ebcba-7e04-41ac-afc6-cfc574163c15.filesusr.com/ugd/6725b5_9513b1db5c614bf7bd62fdcbee6fcd01.pdf?index=true
    • https://uploads.strikinglycdn.com/files/539bd9f0-0f86-42d5-924f-cea7103dd3ba/2014_harley_davidson_street_glide_service_manual.pdf
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_57ff75832c384ce1a49539b160a92a6c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3a1a212b-01fc-416b-8db3-b09682ec571a/midnight_sun_movie_analysis.pdf
    • https://uploads.strikinglycdn.com/files/6ee258f1-a876-4581-9a9b-23e10312f293/64755410219.pdf
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_b88f521a82d94ac1a962a09dc05c546d.pdf?index=true
    • https://c18d9829-3add-4afa-bc87-35007fe3998a.filesusr.com/ugd/70c1ec_80f840c16f4e43b4ae51fabe4101b9d4.pdf?index=true
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_decfd1b299a949c6952bd23b89be36cf.pdf?index=true
    • https://e942959e-95af-4115-ab05-a6e38533eaad.filesusr.com/ugd/66f7a0_a5d5f5a1c3c345c8aaa221d68b579260.pdf?index=true
    • http://makakanow.onlinewebshop.net/xubufizalanadirebuvomizix.pdf
    • https://uploads.strikinglycdn.com/files/1b1c08d0-bbaa-46e7-b5df-8da602ef309a/lufan.pdf
    • https://5f98d79b-b704-4ecc-a618-200e52db7f79.filesusr.com/ugd/d1a5b7_f57fabeac6bd4e0680f7c3c17570ebd4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fb4558d6-3ee5-44fe-95e9-ef0261b1e5e4/84444444456.pdf
    • https://4fdc5cb1-0646-4ed0-9ac1-f9332ff2c333.filesusr.com/ugd/9b9480_b0a13035da1f46548b4b666c1feae3e5.pdf?index=true
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_86fbbfb3cc764fd0893b164823d49ae7.pdf?index=true
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012223.bin
12208768e90e406bdc5834161194d01f07c53244109bbbfc125005f6b796d236		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12223 5104 bytes
font_01_sfnt_off0001337c.bin
6c67e5c42b5badabe6f5e1b06a75e6e3ddbe51b5d7341470fe8fa237bdd4626a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1337C 11084 bytes
font_02_sfnt_off0001598c.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1598C 4324 bytes

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