Malicious PDF — malware analysis report

Static analysis result for SHA-256 61492365b0955f3d…

MALICIOUS

PDF

79.9 KB Created: 2021-04-13 13:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dd1eccab051b5d3ea24e200b5d1fe19b SHA-1: 5b4acf33ccb2c57a71ea474d90d2e2a01157fa24 SHA-256: 61492365b0955f3df6aba505b079d7a202cfa1c8962f93b67133ae53cb4e1c47
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=how+to+know+baby+gender+by+position PDF link annotation
    • https://cdn.sqhk.co/wixakulu/hgjdhbg/haunted_tunnel_car_wash_huntington_beach.pdfIn PDF document text
    • http://fb-pageunderreview.com/sebegigiownyt.pdfIn PDF document text
    • https://cdn.sqhk.co/sewuvavimebi/eK7Thjr/60325638183.pdfIn PDF document text
    • https://cdn.sqhk.co/subilikiwi/brich6S/the_research_age_in_development_group.pdfIn PDF document text
    • https://cdn.sqhk.co/purilusevike/ic17msm/ps2_frogger_the_great_quest.pdfIn PDF document text
    • https://muxupodijem.weebly.com/uploads/1/3/4/8/134885552/85783f07c259ae.pdfIn PDF document text
    • https://lifexusubanipi.weebly.com/uploads/1/3/4/3/134377686/pesibinexer.pdfIn PDF document text
    • http://stavki.link/nutrition_facts_small_popcorn_chicken_sonicmv4cg.pdfIn PDF document text
    • http://temppicture.xyz/borderlands_2_guide_solovkwgo.pdfIn PDF document text
    • https://fojozotewimoko.weebly.com/uploads/1/3/5/3/135324817/rikixulibojuwe-vufikikupipi-jomojanizov.pdfIn PDF document text
    • https://cdn.sqhk.co/befulirawid/FjecyMj/89732620642.pdfIn PDF document text
    • http://movigakamemik.22web.org/dusonagepovavotar.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/iajchfP/8955814300.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mibelajute.epizy.com/reading_comprehension_worksheets_for_grade_2.pdfIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_2daa75b75c404830a0c1ca2074a95891.pdf?index=trueIn PDF document text
    • http://feduneve.rf.gd/29549358302.pdfIn PDF document text
    • http://vilewol.epizy.com/cyberghost_free_android.pdfIn PDF document text
    • https://ff8eac81-0dee-4da4-b7c1-1dee070544a7.filesusr.com/ugd/2637cf_2f3286453e364855946a59887de7d651.pdf?index=trueIn PDF document text
    • http://mofibukuzoke.rf.gd/latest_hollywood_action_movies_2018_free.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_off0000f9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F6 5456 bytes
SHA-256: 6aa97ee29f45c5ba2bed6fa7ea9f47d0ad1bd19217da1a672bf51bceba41dd8a
font_01_sfnt_off00010ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA5 11124 bytes
SHA-256: e305dad6c30ec835163e48a1c90ff06942b91ae75540de6a0066497b57d058b8

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