Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8d62fa0d2deb43…

MALICIOUS

PDF

105.6 KB Created: 2021-02-09 04:52:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3f15be5074aa57154fe9cdff593024e3 SHA-1: cd2fc82dae1f72f167d99ab17d574ac5bc15e015 SHA-256: 0d8d62fa0d2deb436744521b37500d9dbeb54098b2491cc55b56f218ddeb7b52
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting, and several heuristics indicate malicious redirector and link farm activity. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure suggest it is designed to redirect users to malicious sites, likely for phishing or malware 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=sociology%20of%20religion%20pdf%20noun In PDF document text
    • https://turabevov.weebly.com/uploads/1/3/0/9/130968962/6229974.pdfIn PDF document text
    • http://ganirutejiz.iblogger.org/lirotaraxijokolujafeles.pdfIn PDF document text
    • http://you-bestshop.xyz/62568162804thzga.pdfIn PDF document text
    • https://salufisudad.weebly.com/uploads/1/3/2/6/132695294/8d059ace72.pdfIn PDF document text
    • https://tizitumobupo.weebly.com/uploads/1/3/4/9/134904485/4016903.pdfIn PDF document text
    • https://cdn.sqhk.co/badiwugaleko/ufHic3P/dingus_definition_oxford.pdfIn PDF document text
    • https://sobapeseg.weebly.com/uploads/1/3/1/0/131070394/f3c5a6f2d78dc91.pdfIn PDF document text
    • http://dorightschool.com/jixaxogd59pp.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/ge0gfUf/bakiredizalito.pdfIn PDF document text
    • https://duzobiwaroliwu.weebly.com/uploads/1/3/2/6/132696147/dezatid.pdfIn PDF document text
    • https://gazafakapudon.weebly.com/uploads/1/3/4/3/134345815/rizodepu.pdfIn PDF document text
    • https://majejuwusi.weebly.com/uploads/1/3/2/3/132303270/legarugogu-pavovoliwudu-xojoselofe.pdfIn PDF document text
    • https://mokonalu.weebly.com/uploads/1/3/0/7/130739423/wizatonibisoxug_kumus_denosuropaf_rutisoguvaka.pdfIn PDF document text
    • http://vebejisidag.66ghz.com/dodecahedron_project_template.pdfIn PDF document text
    • https://webunufilijamo.weebly.com/uploads/1/3/4/6/134677486/kepavuponuvomobeje.pdfIn PDF document text
    • http://0fruit.space/nibupafaeh9sm.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/zowakasavizoridobowamopap5fs4b.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuguxovim/ShbleIT/traffic_racer_apk_hile_2020.pdfIn PDF document text
    • https://fubediko.weebly.com/uploads/1/3/1/0/131070718/funovowubamu.pdfIn PDF document text
    • http://grampus-shop.com/11456955824ndt4n.pdfIn PDF document text
    • https://kifeketefisub.weebly.com/uploads/1/3/5/3/135347095/jowab-wanoruzap-bowevutuzejivo-kefakofunusim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://getozareburi.rf.gd/arjun_pandit_full_movie_480p.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000160b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160B8 5140 bytes
SHA-256: e55709cc0c32666b2c98b4b9f4677f12baa6de1c5da1cbd8edbc1129419168d3
font_01_sfnt_off00017255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17255 11704 bytes
SHA-256: f0b7b1f131d6c79c1c89ccba5995ad0cdeeb3d0242bd91d6bdad468e169b268b