Malicious PDF — malware analysis report

Static analysis result for SHA-256 193319dee298ebd0…

MALICIOUS

PDF

66.8 KB Created: 2021-02-19 11:41:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 776564b52426130d325e385dcc4d61c9 SHA-1: ac58797427b9fd900ecd93f6077d4bedaf6b513a SHA-256: 193319dee298ebd0f52ec6c4237474d8b9e5e07b6fd29d74f4656e29dd5d9716
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. The embedded URLs are the primary indicators of compromise.

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://bologen.ru/123?utm_term=honda+hrx217hza+lowe%2527s PDF link annotation
    • https://nofixemi.weebly.com/uploads/1/3/6/0/136082439/zobonebu.pdfIn PDF document text
    • https://posajegodat.weebly.com/uploads/1/3/4/4/134477503/a103383616.pdfIn PDF document text
    • http://siditomema.22web.org/73012068855.pdfIn PDF document text
    • https://sikiwakasizo.weebly.com/uploads/1/3/5/3/135318116/dizuj.pdfIn PDF document text
    • https://vatipasa.weebly.com/uploads/1/3/0/7/130775610/nulikopaxel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492575/normal_6018450b85711.pdfIn PDF document text
    • https://fopojikanerev.weebly.com/uploads/1/3/4/8/134888820/sogekuvigowe_nopapaxewiduf.pdfIn PDF document text
    • https://jegobagugixados.weebly.com/uploads/1/3/4/8/134858953/wegidorirefele.pdfIn PDF document text
    • https://welajewovire.weebly.com/uploads/1/3/3/9/133999455/wowowop-pixodijabubiriv-nimiralux-kilefev.pdfIn PDF document text
    • http://muzoc.xyz/wezetomadetonuganuff7oaj.pdfIn PDF document text
    • http://powezikunuzumi.iblogger.org/the_unspeakable_act_movie_free.pdfIn PDF document text
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/xawaximopilim-rodelu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gozotonitiki.epizy.com/maruti_alto_lxi_spare_parts_price_list.pdfIn PDF document text
    • http://mefetapa.rf.gd/font_awesome_5._3_cheatsheet.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_off0000c797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC797 5380 bytes
SHA-256: 1f24f66475665d1f33a0b6225c2ea208cc7bacadcfa5616a50d9c684606db4b6
font_01_sfnt_off0000da08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA08 10636 bytes
SHA-256: afc5b94ab5dab8eaba51a9b1388404a5cc0d1d8386821cc2d69a25149468f03a

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