Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee530de1fee65e4…

MALICIOUS

PDF

76.5 KB Created: 2021-04-06 17:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 0217eb4deeab69d0df1f3b5fbf795890 SHA-1: e90a76c3c6fc4b2874e395cc7c88cc960e13069e SHA-256: 8ee530de1fee65e47c005fccba6d9e7fe00472f679f02ca68c76082474b970c7
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to manipulate search engine results or direct users to phishing sites. The presence of external URIs and the overall structure strongly suggest this document is part of a phishing or SEO spam campaign.

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://ponafet.ru/strik?utm_term=how+to+write+short+concise+sentences PDF link annotation
    • https://cdn.sqhk.co/kedilexele/hi4rje0/sdgs_in_action.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463264/normal_603b678899ae0.pdfIn PDF document text
    • https://fogowedosetoz.weebly.com/uploads/1/3/4/7/134703805/donabugog.pdfIn PDF document text
    • https://fadurobudafeme.weebly.com/uploads/1/3/5/9/135959894/2295975.pdfIn PDF document text
    • http://zunololanuxigu.sportsontheweb.net/ninestars_trash_can_lid_replacement.pdfIn PDF document text
    • https://potepivogatofef.weebly.com/uploads/1/3/2/7/132740463/a349747.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414678/normal_601a513a022e0.pdfIn PDF document text
    • https://jozinuzo.weebly.com/uploads/1/3/2/7/132712000/nobulitizimawif_pononuji_kenuxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393751/normal_60527539e0656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393348/normal_6052230f9eee2.pdfIn PDF document text
    • http://pekefosijemibi.sportsontheweb.net/accident_incident_report.pdfIn PDF document text
    • http://xixofafil.medianewsonline.com/rpp_barisan_dan_deret.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450721/normal_5febcd9b9a09e.pdfIn PDF document text
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/zunegefiru_zomed_rolavagunum.pdfIn PDF document text
    • http://siluvuxifebul.medianewsonline.com/centrelink_carer_payment_form.pdfIn PDF document text
    • https://cdn.sqhk.co/matezafun/fRgJVRv/personality_disorder_definition_mental_health.pdfIn PDF document text
    • https://tizevilujiv.weebly.com/uploads/1/3/1/4/131406709/suwemexuzukumaz.pdfIn PDF document text
    • https://cdn.sqhk.co/lediname/jbBIxGC/imd_orchestrating_winning_performance.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/jhcZWhd/vasefapenigipevozidekosu.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwuxa/WNidmB8/best_new_ringtones_2021_free_download.pdfIn PDF document text
    • https://gotitodurafa.weebly.com/uploads/1/3/4/3/134351762/2774967.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zezofakarol.myartsonline.com/31885317504.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_off0000f106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF106 4696 bytes
SHA-256: aaa7ee97ae3dc911e481d1404eb1d39618a9479e3e80f1aa2445b59f0df1d3e2
font_01_sfnt_off0001010e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010E 10588 bytes
SHA-256: 7df5ca175efba7e668a18815848f6629d966b83b2c8c8f220c1b4bb053d60283