Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b4c06f4054c617b…

MALICIOUS

PDF

76.4 KB Created: 2021-03-31 08:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f2f82333fce15d5abe7e04efed25201 SHA-1: d1cec35960bad9b8fc1e8315625e659cdd7a16a6 SHA-256: 8b4c06f4054c617bc5872d8c29e281a483de812a1b008b4c4e450369116892d2
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. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, likely to manipulate search engine results or direct users to phishing sites. The presence of embedded URLs further supports this, with one notable URL being https://soxebez.ru/aws?utm_term=lima+india+foxtrot+tango+meaning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://soxebez.ru/aws?utm_term=lima+india+foxtrot+tango+meaning
    • https://tibilizam.weebly.com/uploads/1/3/0/7/130775373/382477.pdf
    • https://cdn.sqhk.co/samekikogeri/OjgBiaU/80533905732.pdf
    • https://cdn.sqhk.co/talexadu/hajaRha/xtreme_magic_sing_warehouse_sale.pdf
    • http://lasabobobatir.22web.org/receptor_nicotinico_de_acetilcolina.pdf
    • https://paxupodef.weebly.com/uploads/1/3/4/7/134763896/tawirizunija_foxuvatidofi.pdf
    • https://wusatotaluvak.weebly.com/uploads/1/3/4/4/134469206/roxejisesew.pdf
    • https://neletataw.weebly.com/uploads/1/3/1/3/131398134/vegabozojegujofi.pdf
    • https://cdn.sqhk.co/zotofoza/bgegg9r/2919817522.pdf
    • https://cdn.sqhk.co/kefekawit/Jtjbbic/charge_2_charger_cord.pdf
    • https://dapobirot.weebly.com/uploads/1/3/4/8/134888013/buwavozibijenarosazu.pdf
    • https://cdn.sqhk.co/sileluzorupo/hfhjhav/fasiwozepusabelexi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e028ba52-6c86-493e-86b7-fecf7cd1c3eb.filesusr.com/ugd/bcb9fd_285b7ce6f7114af092b23ec9476d8a48.pdf?index=true
    • http://refufigatuzar.epizy.com/congregational_form_of_church_government.pdf
    • https://eeeff038-21f9-42a6-bde0-cd945221d618.filesusr.com/ugd/9dc459_406c7fca32d541f88ec6205c0da0f5db.pdf?index=true
    • https://d52aed46-be45-4f9b-8106-cf6fc7ee66c0.filesusr.com/ugd/b148e5_0b375d72f4c64b9b91fa650722477057.pdf?index=true
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_820c1bb4cf5445c48b3e82658e5f8aed.pdf?index=true
    • https://s3.amazonaws.com/bisiku/gilosazodatajalujepa.pdf
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_909a1569f6a845b49b1db78965389d38.pdf?index=true
    • http://tewidunutazi.rf.gd/56392484202.pdf
    • https://s3.amazonaws.com/nagev/composition_of_transformations_worksheet_key.pdf
    • https://s3.amazonaws.com/tutasujal/kugekedesedabebufesufo.pdf
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_3067e3ad2dba44a98511dd060c1019a4.pdf?index=true
    • http://gilasorizarer.rf.gd/essential_words_for_toefl.pdf
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_12e8d74d4f9b4751b475cce40105e2a9.pdf?index=true
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_76f519e226754d65b1b158b19ef34c46.pdf?index=true
    • https://s3.amazonaws.com/legapatatezisa/63985010886.pdf
    • http://piwuzodoxomox.epizy.com/68847084692.pdf
    • https://s3.amazonaws.com/tapelu/tutepopuduj.pdf
    • 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_off0000ee6b.bin
43f3789a56c96d37299e264e84e3491b92f6a670db495ff698105a35b98bb0d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6B 5024 bytes
font_01_sfnt_off0000ff77.bin
2c19fc21bce64f21d8563e8a8fd334d72b6327c24f3a4fd0589fab305c97a109		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF77 10676 bytes

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