Malicious PDF — malware analysis report

Static analysis result for SHA-256 1468011694f216a2…

MALICIOUS

PDF

71.1 KB Created: 2021-05-16 00:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b10a5cf9796da2fe456e9bba4d98b5c8 SHA-1: 1fe68871446d34e7ffdfd67194fd87cc8b774144 SHA-256: 1468011694f216a2035f558be98d0f6cf50dcb473cc81ee540b8875764df7f53
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of numerous external URIs and the PDF_SEO_LINK_FARM heuristic strongly indicate a phishing or malware distribution attempt.

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://nipisod.ru/strik?utm_term=plt+legend+color PDF link annotation
    • https://janolonixo.weebly.com/uploads/1/3/3/9/133987325/201530.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/nirinalubofubcg97t.pdfIn PDF document text
    • https://piwunosorelid.weebly.com/uploads/1/3/4/5/134590209/c523d41.pdfIn PDF document text
    • https://cdn.sqhk.co/xojurolaruk/ijjcNhe/55456806516.pdfIn PDF document text
    • https://cdn.sqhk.co/dufolatik/iijcvas/69749263720.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/yC91Lji/sweet_crossing_snake_io_ios_download.pdfIn PDF document text
    • https://botosedasirewen.weebly.com/uploads/1/3/5/9/135961685/3815059.pdfIn PDF document text
    • https://cdn.sqhk.co/pujigaloruri/hfji5ie/99_walks_top_women_s_walking_app.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/0Mhdjg3/heron_island_wind_direction.pdfIn PDF document text
    • https://cdn.sqhk.co/xavonepez/3H4OGSt/bawubatidojuz.pdfIn PDF document text
    • http://uk-delfin.ru/que_es_el_lenguaje_verbal_segun_autoresl79px.pdfIn PDF document text
    • https://gosedizomomusuw.weebly.com/uploads/1/3/4/3/134313056/128e6.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/ehchbMF/jesurikom.pdfIn PDF document text
    • https://cdn.sqhk.co/dagufiwus/ieijKij/84935252355.pdfIn PDF document text
    • https://talogaxuzule.weebly.com/uploads/1/3/4/5/134596774/1141173.pdfIn PDF document text
    • https://cdn.sqhk.co/xisapabo/gehigjh/yaara_song_video_arishfa_khan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0a9d52b7-bae8-445b-b6d2-8eba0f02533c.filesusr.com/ugd/729231_f108ddec6079469bbe1827384c20196c.pdf?index=trueIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_e3f44983e80b4c149b838422aa10f84e.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_off0000d903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD903 4720 bytes
SHA-256: 5e23ac13f8c49252b42e256f8b15e845bf3c0b003f07adb9103969cbaef3f99d
font_01_sfnt_off0000e922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE922 10916 bytes
SHA-256: 3b0f5f45b957924e4ca52cd2c7f10216a3dc8cf9f7d8f4910adb56dc554cd1eb

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