Malicious PDF — malware analysis report

Static analysis result for SHA-256 502f06acddf3e757…

MALICIOUS

PDF

69.5 KB Created: 2021-04-07 06:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6357b4952805d22314cbeaab72769f18 SHA-1: fe90e141d5d20d49b5ea79e340f0948870ab3177 SHA-256: 502f06acddf3e757829fdb97f0431bd507baea359f20cea838495399a221ca3e
154 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, and it contains a large number of external links, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://mezovuduw.ru/award?keyword=use+of+recycled+aggregates+in+concrete.+pdf, which is likely used to redirect users to further malicious content. No scripts were extracted, but the PDF structure itself is indicative of a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9678

Heuristics 4

  • 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
  • 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://mezovuduw.ru/award?keyword=use+of+recycled+aggregates+in+concrete.+pdf
    • https://cdn.sqhk.co/gejupajo/Eri4Bgh/orange_tree_leaves_falling_off.pdf
    • https://cdn.sqhk.co/jilebodetifa/hjhatoh/blaze_monster_truck_halloween_costume.pdf
    • https://cdn.sqhk.co/dudugetogi/4UBggmI/exocraft_build_battle_space_ship_fleetstream.pdf
    • http://voicebftyi.com/8310088074024axi.pdf
    • https://cdn.sqhk.co/sesijisova/ihhaxpg/tigoko.pdf
    • http://x-bionic.shop/80812274663bfjle.pdf
    • https://cdn.sqhk.co/lafuwexale/lsV2ihm/58422415561.pdf
    • http://winoorama.space/xoduwuxupudwrr7i.pdf
    • https://cdn.sqhk.co/balaragu/tEI26ih/tilokusubudorakaginobutur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_2c9e838a720b4264972ade41ccc1e160.pdf?index=true
    • http://nowavef.epizy.com/can_turtle_beaches_work_on_ps4_and_xbox_one.pdf
    • http://fipulosabonug.epizy.com/69913497021.pdf
    • https://f39f7cea-6337-46de-af4f-699959e6db0a.filesusr.com/ugd/004672_69448ada03d54bb195f42698e39a79dc.pdf?index=true
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_8fd6f147f2e44336b07fbcd07d63b519.pdf?index=true
    • https://77abcf6a-1f47-4233-a5f7-28832101be0a.filesusr.com/ugd/e29e5c_4bb9b4b8c51a425eb0b5dc82ef8630d3.pdf?index=true
    • http://lidikulogape.rf.gd/65459607670.pdf
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_5b473e0342ca4cff9237f8121f043500.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3b5.bin
c45df80628bec6d4de0539b49d1dd7d6a94e7ecaaf1516d7332653696e75cec1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B5 5448 bytes

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