Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aba4a504cfdf01e…

MALICIOUS

PDF

110.5 KB Created: 2021-03-18 09:53:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7d3e96820dc5696f52ebe3a6c1a495d SHA-1: b5eb541e357c1a8f49c7f4a38227334b5c939692 SHA-256: 9aba4a504cfdf01efa8395845e40238cb554448b9ad73d9648d586695feb8fbf
164 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The ClamAV detection and ML classifier also indicate malicious intent. While no scripts were extracted, the presence of numerous external URLs and the 'SE_URGENCY_LURE' heuristic suggest a phishing or traffic-driving campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 6

  • 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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ponafet.ru/strik?utm_term=double+dapple+dachshund+health+problems
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/5823894.pdf
    • https://cdn.sqhk.co/ditetona/ijfje41/nogetifusikebej.pdf
    • https://fifubinagate.weebly.com/uploads/1/3/4/8/134854053/pisejafumove.pdf
    • https://jipunelokafup.weebly.com/uploads/1/3/4/1/134109215/xuxavazilimab_lozitixakin.pdf
    • https://static.s123-cdn-static.com/uploads/4388280/normal_5ff47e55a2e54.pdf
    • https://cdn.sqhk.co/zaborofisi/4jhihuQ/30755136016.pdf
    • https://cdn-cms.f-static.net/uploads/4414868/normal_602b2c3c0fd19.pdf
    • https://rinapaluvubozi.weebly.com/uploads/1/3/4/6/134669605/5459412.pdf
    • https://cdn-cms.f-static.net/uploads/4412767/normal_6048f4ea7f407.pdf
    • https://cdn.sqhk.co/pitazitizej/2igNqhi/mufijududodovisegev.pdf
    • https://static.s123-cdn-static.com/uploads/4451575/normal_60052d65f380b.pdf
    • https://static.s123-cdn-static.com/uploads/4447641/normal_5fed45075971e.pdf
    • https://cdn.sqhk.co/tosuwukiwate/mgdiaDd/soop._io_parent_and_student_app.pdf
    • https://static.s123-cdn-static.com/uploads/4413345/normal_5ffba2eff00bf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_4779f4bf371e4edea58b6323b84efee7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8b3f8a81-f792-4242-8b96-aff4f7bfa05f/dagijivukalilotu.pdf
    • https://uploads.strikinglycdn.com/files/b124f428-9cb1-435c-b7cb-893060a6b6ce/60500523949.pdf
    • https://aca56392-15ae-48e8-982c-fdf6c4ac0dc3.filesusr.com/ugd/00c070_d46904d924f346a7801ed87ea2a5b9a2.pdf?index=true
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_cfa8004ef1204afeaf286e5ce73e3b6f.pdf?index=true
    • https://b5c90759-dbf8-4ccd-b12d-e23c958527f9.filesusr.com/ugd/915a55_12380699e7794ec6af1d2a4a8238f8a1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/76803c36-6f8c-477b-a09b-b7644257db8d/casio_gw-9400_manual_espaol.pdf
    • https://uploads.strikinglycdn.com/files/a21adfda-876a-42db-a934-d9356f33b694/interior_decorator_salary_los_angeles.pdf
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_0abe183ec9924fbb938dd54b6085b3d4.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015832.bin
915eb6ac59f621a1c222c9a32da2e9783e475e380e562181450d0ca6122fa180
pdf-font-stream PDF embedded font (sfnt) at offset 0x15832 5452 bytes
font_01_sfnt_off00016a8e.bin
3030c4fa5740af183cf89db514eb9a29ed0afef189756040bf15133a1f57ee97
pdf-font-stream PDF embedded font (sfnt) at offset 0x16A8E 11800 bytes
font_02_sfnt_off0001928a.bin
ff1b431ae899271ac88199f2a624bfa467931a6e15b730365e3a6d5dc92eed2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1928A 17400 bytes