Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa15ac01fb5f927…

MALICIOUS

PDF

87.6 KB Created: 2021-03-09 16:55:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9bd0c5b743d3559e6533f800067a445e SHA-1: db12201a54baee4777162fbf97b83cffe0b8ce0d SHA-256: 2fa15ac01fb5f927f03e210e5d8ccdbd2683fceb86e0029c23113eccd115a323
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/strik?utm_term=hitachi+c10fsh+parts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384819/normal_603727a2ec3d6.pdfIn PDF document text
    • https://kalozepi.weebly.com/uploads/1/3/0/8/130814360/2666868.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486206/normal_5feb3059079d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487201/normal_6028f5662a996.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383147/normal_6009e99ba5432.pdfIn PDF document text
    • https://rizofuruw.weebly.com/uploads/1/3/0/8/130873790/maxovi_nadikepo_bifoked.pdfIn PDF document text
    • https://losuwigawoje.weebly.com/uploads/1/3/5/3/135304717/331424.pdfIn PDF document text
    • https://levukuwaxumofet.weebly.com/uploads/1/3/1/3/131383949/mekexesuse_podewugevopil_saluse.pdfIn PDF document text
    • https://bafuzonexive.weebly.com/uploads/1/3/0/7/130739369/zikasajofujerato.pdfIn PDF document text
    • https://nudabixe.weebly.com/uploads/1/3/4/5/134505388/7140853.pdfIn PDF document text
    • https://girusetobar.weebly.com/uploads/1/3/1/0/131071114/2300884.pdfIn PDF document text
    • https://rukatopuwor.weebly.com/uploads/1/3/1/1/131164291/2011435.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470839/normal_60141f7b8ae96.pdfIn PDF document text
    • https://zipixaxunisegon.weebly.com/uploads/1/3/4/6/134625234/c842f6a8e.pdfIn PDF document text
    • https://zizeximafebofiz.weebly.com/uploads/1/3/4/3/134369397/9018613.pdfIn PDF document text
    • https://tumumasozoborux.weebly.com/uploads/1/3/1/4/131453535/fd757.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b1206fd0-99c3-4cda-8b6d-221e9e0f136b/34562353004.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/panasonic_model_kx_tga410c_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7b72cae-f555-4d01-8055-59a83b22c31d/how_to_make_a_flavored_simple_syrup.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/96446024800.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/biografia_de_alain_touraine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b37155-65df-4568-acf6-ec361340d608/lagosanitevogad.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/28864148454.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a76ae091-a7db-46c9-98f7-1bc16c58b7c5/how_much_aid_does_china_give_to_other_countries.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9E 4680 bytes
SHA-256: ffc5e7f50bf0c4fa24aba2ac39089ca443050acff30c88b43cf009d06863bb91
font_01_sfnt_off00011d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8A 10904 bytes
SHA-256: f1c403f78485fc734c9ebe1e408796857dac1ac5cf05b3453f39577c1a89b589
font_02_sfnt_off0001415d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1415D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34