Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07d123d9faeb8f5…

MALICIOUS

PDF

76.9 KB Created: 2021-03-05 02:46:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 21f970f824600099f75f0762693e3c84 SHA-1: d00906a933b34459f32f8a4300e570409e56fd93 SHA-256: f07d123d9faeb8f5c6c56901f6beae7caae688af38584105e2534ae378ae5823
186 Risk Score

Malware Insights

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

This PDF document contains numerous external links, many pointing to disposable hosting services, suggesting a link farm or phishing attempt. The presence of a "how to fix oven knob" lure in the document body, combined with the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, indicates a likely attempt to drive traffic to malicious or scam websites. The ML classifier and ClamAV detection further support its malicious nature.

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://baarspo.ru/strik?utm_term=how+to+fix+oven+knob PDF link annotation
    • https://rolorizumi.weebly.com/uploads/1/3/4/3/134316308/fulezaselefamebil.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwetebep/Mjagfih/11621229834.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/idKhgiT/supervpn_free_vpn_client_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/tijovomiv/fihJjg8/launch_today_nasa.pdfIn PDF document text
    • https://gefivogixofix.weebly.com/uploads/1/3/0/9/130969648/e5415b6b1ca.pdfIn PDF document text
    • https://dolevepi.weebly.com/uploads/1/3/4/5/134587457/390cf.pdfIn PDF document text
    • https://dupazenulejafu.weebly.com/uploads/1/3/4/3/134331878/jumukilop_koziguto_wedojel.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/icP6rjd/pewumutodazek.pdfIn PDF document text
    • https://kagozekexep.weebly.com/uploads/1/3/5/9/135956698/lozafaxi_wivopuvaruxola_pukaxanozera_juzagojikufe.pdfIn PDF document text
    • https://cdn.sqhk.co/rujoremebi/hAGBVjj/project_manager_certification_austin.pdfIn PDF document text
    • https://wabatopopelak.weebly.com/uploads/1/3/0/7/130775953/6f72ea.pdfIn PDF document text
    • https://cdn.sqhk.co/duxapotor/ggie7Dv/crashmetal_cyberpunk_apk.pdfIn PDF document text
    • https://tewawizibix.weebly.com/uploads/1/3/5/3/135347661/529974.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/aZVhdia/63565895883.pdfIn PDF document text
    • http://wisagomojinux.iblogger.org/customer_visit_report_template_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/gjg9GWU/kuparopilawozegetinegizos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_5a3ab53f115c429fae56b89e1bda5dbf.pdf?index=trueIn PDF document text
    • https://a2fe464c-28d1-4db8-bb2d-552ad9bc2f4d.filesusr.com/ugd/941bb1_21fe63666e4c4ac2abe97bb3ed946421.pdf?index=trueIn PDF document text
    • http://vomogowejupilu.rf.gd/zidowufowugonikenelomavo.pdfIn PDF document text
    • https://def26600-86c9-4442-a738-094ddf2992d1.filesusr.com/ugd/eb5a6a_5ca8b1e418c64f72b819f16bc4faaafd.pdf?index=trueIn PDF document text
    • https://c84ffda1-e72a-45fa-8ce8-a771970cf326.filesusr.com/ugd/9fd656_0d290bfc024a45c3bc3a66e5f09a18d6.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_off0000f285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF285 4632 bytes
SHA-256: ebc7489404653a592d674eaa709c7fd24c283123ec2d5f2ac46e2dd660469aea
font_01_sfnt_off0001027b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027B 10556 bytes
SHA-256: 374554ded41d3a6717fd4eb79e884da67a9d5db2f1dc3946fc3ae2a61dca0bcd