Malicious PDF — malware analysis report

Static analysis result for SHA-256 741ad4e223fd4efa…

MALICIOUS

PDF

73.8 KB Created: 2021-06-11 16:16:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ad990f30c50cd158703b9fa6b367d5d5 SHA-1: aebf004a880175918b7e9152f4b5ee15e5252bd6 SHA-256: 741ad4e223fd4efa1f180351e57b4a92b70ee5dee8b3214bfb9a4b70bb1f466a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm for SEO manipulation or malware distribution. The primary URL, 'https://crewmak.ru/pbw?utm_term=download+gta+sa+cheater+apk', explicitly attempts to lure users into downloading a GTA cheat, which is a common pretext for distributing malware. ClamAV and ML classifiers also strongly indicate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://crewmak.ru/pbw?utm_term=download+gta+sa+cheater+apk PDF link annotation
    • https://wubobuxidozexe.weebly.com/uploads/1/3/4/3/134322977/winemulexivexepezep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446152/normal_5fe95e7904741.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_602813a40c54f.pdfIn PDF document text
    • https://pofisuxix.weebly.com/uploads/1/3/4/0/134016862/a6f4272e42c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408463/normal_5fc998c278852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452624/normal_60246fe8a068b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408176/normal_5fe626848244c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369313/normal_5ff1884ab91d5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d423eedd-1825-4d13-8544-21ab657a54a4/30866412321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9ec8869-99f5-4879-9531-f0db398fbf53/vukofozizisufuzugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a2c6cee-2163-44e3-805d-432eab6c09c3/yamaha_rx-v673_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c62f5189-5b8b-424a-a80c-28e1873ad4ea/87167835798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e38ea04-0b34-418b-8784-d4c31c4442c3/kirkland_spiral_glazed_ham_cooking_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2db8c08-3bbc-4e60-bfcd-034a823fd651/9520481537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1c1f6f7-ca8d-4ebb-9711-a3b8384d7e2e/pillars_of_the_earth_books_in_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fc36fad-2889-4c46-b339-96979ead7e95/what_are_the_major_stock_indices.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90182eec-d32c-4599-a9e8-9b889adb4eee/mthode_abc_maintenance_exercice_corrig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cb5447c-467e-46c9-a3cc-f0b882c7aa34/denon_avr_1905_factory_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04c73975-35fb-450f-8d89-bee778009357/2318018215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/258690a0-8270-4f5e-abf7-278f8d22fbf3/vuxovoperirefiwabep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b9300e-d624-449a-9c26-0f622498db07/pubimifuguliwimaduximi.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C4 5488 bytes
SHA-256: 9dce630fb9cc54d1c22dab411d045af0ed2c04933a5e27318e5a89144f869e95
font_01_sfnt_off0000e987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE987 15024 bytes
SHA-256: b15a10e6d4b3262b9b9b564c1a57bdb1b7a321c25347384ef81cd0b8246fb8b7