Malicious PDF — malware analysis report

Static analysis result for SHA-256 8446c26141458c2d…

MALICIOUS

PDF

81.1 KB Created: 2021-05-03 12:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b347c262b7faf4286b2372279a720957 SHA-1: 4bda57e0ac02457880f7d47d3813e9853bbd9f9d SHA-256: 8446c26141458c2d1de0627f72c9fc36550768cb708845622bb5c2245c3e8315
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or phishing attempt, with specific URLs pointing to suspicious domains. The document body, though heavily obfuscated, appears to be a lure related to online games, aiming to direct users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=how+do+you+get+a+rock+pet+in+adopt+me
    • http://wavapivanuf.scienceontheweb.net/gloomhaven_rule_book.pdf
    • http://sesizuxewewax.mygamesonline.org/is_it_illegal_to_not_renew_a_lease.pdf
    • https://cdn-cms.f-static.net/uploads/4473041/normal_603527957131c.pdf
    • http://dewodalaluw.mygamesonline.org/ayatul_kursi_in_urdu.pdf
    • https://cdn-cms.f-static.net/uploads/4470977/normal_603bd8ba7b964.pdf
    • http://wasegulom.mygamesonline.org/83617792378.pdf
    • https://cdn-cms.f-static.net/uploads/4486742/normal_6029d6730770d.pdf
    • https://cdn-cms.f-static.net/uploads/4385847/normal_6051fef9a6208.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d70b1dc8-7d09-4148-9854-e6a7cae1b87b.filesusr.com/ugd/5899d5_d5c0925c0fff42d7aea36b7d97586854.pdf?index=true
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_05339a99aa274cfb8481aeae0e2f8fe7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/cdc9ff4a-c964-421e-9688-2ae896c3c1d5/1996_polaris_scrambler_400_4x4_parts_diagram.pdf
    • https://899154e9-876a-4ab4-94d5-c8ef2aed10f2.filesusr.com/ugd/dcf9ad_138965ad28944bdfbbfaebf49dd252bf.pdf?index=true
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_30f2f8d4bdac4e56871835417218dd23.pdf?index=true
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_ac8e932f5797418fabd9c1373d1c8270.pdf?index=true
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_c5f31e624259479995ead25446409820.pdf?index=true
    • https://17673d3b-e5d0-4e0e-8211-f079fadf35f5.filesusr.com/ugd/13ae68_b73a3b681d1f4b7bb085f287101186d1.pdf?index=true
    • https://a0758896-f8c2-4fc9-8c7e-5c1738e8bc18.filesusr.com/ugd/0ce882_7087e5aca67a425183ce52a77f9fe613.pdf?index=true
    • https://64e1471b-64f8-4582-b127-b1692805dd1b.filesusr.com/ugd/507a3d_17f826c105cb49bb840dd0366eefb39a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/f29c5079-d744-46c5-a57d-ba81a64a0d09/math_worksheets_for_grade_4_division_word_problems.pdf
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_668590c0f40548eab4e2e5b2db7ca9a4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/42c6ac99-e016-40ef-9034-9b0d4da929a1/18879832499.pdf
    • https://uploads.strikinglycdn.com/files/8bf7195b-f5f4-46a3-b671-049c2bff39cd/tc_helicon_harmony_singer_2_vs_1.pdf
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_972545bc5453493fb524227bcc6eea97.pdf?index=true
    • https://b2f3f1fb-4f3f-4d5d-be65-f5b10dce6288.filesusr.com/ugd/735189_84d0f6195da94564b83777baefd95ea4.pdf?index=true
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_5656e0a82b1a49fd821f2d4df682ee32.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffa3.bin
0a10ffabbc4ba36a13e442cc48a387568785188e6261a7f881548e3b57720cc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA3 5404 bytes
font_01_sfnt_off0001120a.bin
5e20da6cc20edfd13b67e507af59691356fcda060ee5540a8a9c83101600e8a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1120A 10860 bytes

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