Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c184e5a20d2eb1a…

MALICIOUS

PDF

80.4 KB Created: 2021-02-16 13:31:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9b2318d1868071e6a6b01b652ea5ea38 SHA-1: 952d36503cc92a5f1fc3de23f447582227e4398b SHA-256: 0c184e5a20d2eb1a3b6fc5f360c9d073752b9de097fbe1c86be2b9121a11f98c
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with one prominent URL suggesting a lure related to Excel data analysis. The ClamAV detection and ML classifier strongly indicate maliciousness, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of a campaign to redirect users to malicious sites, likely for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/123?utm_term=how+to+analyze+data+in+excel+2007 PDF link annotation
    • https://gizazegixewaner.weebly.com/uploads/1/3/4/5/134596748/rixatedamufowojulifi.pdfIn PDF document text
    • http://tronreserve.online/crystal_reports_2016_case_statement_multiple_valuesdswgv.pdfIn PDF document text
    • http://item-mask.top/88707685475wwf6v.pdfIn PDF document text
    • https://jevamupoledi.weebly.com/uploads/1/3/4/7/134712268/c9b3cbc9f046.pdfIn PDF document text
    • http://freshremont.com/jujinuzdvg9m.pdfIn PDF document text
    • https://fumitalabojaluk.weebly.com/uploads/1/3/5/3/135399187/9238450.pdfIn PDF document text
    • http://armlur.space/naturalistic_planting_design_the_essential_guide2c16q.pdfIn PDF document text
    • http://andyhong.blog/1883150500qffes.pdfIn PDF document text
    • http://prizinsta.info/wikuwulimaronusazukajedinqbjm3.pdfIn PDF document text
    • https://dusomekekonipa.weebly.com/uploads/1/3/4/5/134580960/vovaja.pdfIn PDF document text
    • https://teraxamexad.weebly.com/uploads/1/3/1/3/131380600/jaras-zowupumoreza-gesiladufasura.pdfIn PDF document text
    • https://gesemobi.weebly.com/uploads/1/3/0/7/130738939/45b8d44ccbf.pdfIn PDF document text
    • http://antonio-ita.space/kaiser_permanente_login_careersi8l6p.pdfIn PDF document text
    • https://kumeboxisadinur.weebly.com/uploads/1/3/4/6/134684257/808c756cdea12fa.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
    • http://zinezalidoratov.rf.gd/zadurujadumot.pdfIn PDF document text
    • http://lolurisufetofel.epizy.com/smeg_range_hood_installation_guide.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE397 5072 bytes
SHA-256: 569f707e74b07299fc79748164be51567819007612343850e3a2702570f5adc3
font_01_sfnt_off0000f501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF501 3316 bytes
SHA-256: 9efceaddf7c019866a9bc6e1bc755d9f2c3e4e800d83c3b27ac425756471b57b
font_02_sfnt_off000102c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C8 10356 bytes
SHA-256: 537e1970229bea038dae6e50dca94bd895353f3fba326c0ec2ab9d157630d73c
font_03_sfnt_off000125e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E5 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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