Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b0e2d8a9f48df2a…

MALICIOUS

PDF

87.5 KB Created: 2021-04-06 20:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b3b87fe480647206e57b81e8e4a815c0 SHA-1: ec408437c5e70f5f502fb96c3415a96dd7c2b6bf SHA-256: 0b0e2d8a9f48df2af3aff9fc8459cc65e29a925ff72600bbb84aae6e010ae364
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to host phishing content. ClamAV and ML classifiers identified this PDF as malicious, specifically as a phishing trojan. The presence of numerous external URIs, including a link farm heuristic, strongly suggests a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/award?keyword=mud+logging+pdf PDF link annotation
    • http://futajef.medianewsonline.com/branches_of_social_science.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416319/normal_6053c458a4dfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372100/normal_5fe6a6d068227.pdfIn PDF document text
    • http://situvupumu.medianewsonline.com/88756720198.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413977/normal_600a4107480a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_34cfb85ebf3f4c18b96c094fd45472db.pdf?index=trueIn PDF document text
    • https://c7f0abc7-d23b-482d-bd16-0771495bb668.filesusr.com/ugd/bb13a2_16fbfa9b6076454d9435a198f9408390.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizufapu/chocolate_and_tan_dachshund_puppies_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/manualidades_de_papel_para_nios_faciles.pdfIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_f05d8ab3eee94efdb470046c46b45b9d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ligole/32972188262.pdfIn PDF document text
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_c21bbbdbbb374a3c9f8538a352a337c8.pdf?index=trueIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_6cc34dc67cb94bb5a98a10b87bd57f0d.pdf?index=trueIn PDF document text
    • https://ee67c5b3-b4d3-4257-b425-af55881d3a68.filesusr.com/ugd/c60da7_3dbfe211dcd143589bc705e1fcb7ad31.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/ischemic_heart_disease_guidelines.pdfIn PDF document text
    • https://0cc2a7d0-6f33-4335-9ec9-554d9418487e.filesusr.com/ugd/cb4a18_ee58aee3cfe34e48bafebbb3fd4c31d4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/22655168221.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/does_gravity_cause_friction.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/ridgid_16_gallon_shop_vac_replacement_hose.pdfIn PDF document text
    • http://fidikaxano.myartsonline.com/losowenemazemokeju.pdfIn PDF document text
    • http://valupakukav.myartsonline.com/vatikefokinibetuzipapu.pdfIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_2fa98355dbf741e996ed40245bb44aeb.pdf?index=trueIn 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_off00011921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11921 4728 bytes
SHA-256: 21cb983a4774c8a8441afd151c3db2a95841e748dd65975c6ea28c440a956f55
font_01_sfnt_off00012962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12962 11488 bytes
SHA-256: f956909cc236e316650b0731c68a1a8771097b1b8abeff75e018e3d612a14153

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