Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6f2ef98946c968…

MALICIOUS

PDF

77.1 KB Created: 2021-02-28 19:55:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 82f685e2546843b6129ff0438f42e3c7 SHA-1: 95a29b6ef548b301d08323d5f86eff7affa9eef0 SHA-256: 2e6f2ef98946c96828f8021048622545f09ae07f7ee992fc75294aaf002a8db7
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both a machine learning classifier and ClamAV. It contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The presence of external URIs and the overall structure strongly suggest a phishing or malware distribution campaign.

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://lozipotod.ru/strik?utm_term=how+do+you+use+a+honeywell+cool+mist+humidifier PDF link annotation
    • https://jalagowozitaj.weebly.com/uploads/1/3/5/9/135967583/4426119.pdfIn PDF document text
    • http://relax35.ru/elementary_linear_algebra_solutions_manualf2zcv.pdfIn PDF document text
    • http://trells.space/bug_defender_pest_managementhvrxl.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/ngfL1ih/imagine_dragons_demons_letra_espanol_ingles.pdfIn PDF document text
    • https://ruzuwigowan.weebly.com/uploads/1/3/1/4/131453288/ef381928151fbc3.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/attack_on_titan_season_4_episode_release_date_schedule.pdfIn PDF document text
    • https://mifimixaxenerut.weebly.com/uploads/1/3/3/9/133999571/2001078.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/SbggRif/91494519281.pdfIn PDF document text
    • https://cdn.sqhk.co/romumoxoleno/jdHid7v/waterman_retro_world_map_bar_and_serving_cart.pdfIn PDF document text
    • https://wokopapun.weebly.com/uploads/1/3/5/3/135388848/lovufujimegef-fomiferi-nexifekim.pdfIn PDF document text
    • https://womegirig.weebly.com/uploads/1/3/4/5/134506381/guwoku_xolimogabefazeb_bakagafa.pdfIn PDF document text
    • https://cdn.sqhk.co/gajeneset/Qhhcign/xuzomamibemilodefozuzaxi.pdfIn PDF document text
    • https://rapelolizoxofi.weebly.com/uploads/1/3/1/3/131381924/tariwidujagu.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/1996_mercury_9.9_4_stroke_manual.pdfIn PDF document text
    • https://rudixesawemes.weebly.com/uploads/1/3/1/1/131163949/58b1df472.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f02a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02A 5416 bytes
SHA-256: 24533cbcca11d10f80d3295fa4a5ae407e8f91419f0f6e712964380f86a98f41
font_01_sfnt_off0001027f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027F 10692 bytes
SHA-256: 48f8f13a07261bb545c17c0c6c44a2a66d65797ecaa37b143b0fc5a69af04fbc

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