Malicious PDF — malware analysis report

Static analysis result for SHA-256 58368ffd19c03102…

MALICIOUS

PDF

134.7 KB Created: 2021-02-24 01:18:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8962820b676841a83555875737a78242 SHA-1: e4e63aec18aeeb55e297ae2902ce7b41a63fc644 SHA-256: 58368ffd19c03102af0bac85253c8ea8ad8ef04461cf1d4607def73d100d0345
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a malicious intent to redirect users. The ML classifier and ClamAV detection strongly indicate maliciousness, with the PDF being flagged as a phishing trojan. The embedded URLs are the primary indicators of compromise, likely leading to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/strik?utm_term=what+is+the+lesson+of+jason+and+the+golden+fleece PDF link annotation
    • https://betutoza.weebly.com/uploads/1/3/4/8/134899773/fasumuzawoti_limadilobo_vebov.pdfIn PDF document text
    • https://cdn.sqhk.co/dufolatik/1jfLcie/pandemic_game_online_unblocked.pdfIn PDF document text
    • https://gulipuzajetag.weebly.com/uploads/1/3/5/3/135397689/surodavitu.pdfIn PDF document text
    • http://barberking.best/85270555936kebll.pdfIn PDF document text
    • http://itasummer.fun/witaleiq6ie.pdfIn PDF document text
    • https://wurulukonena.weebly.com/uploads/1/3/5/3/135398735/zetolepukadawomon.pdfIn PDF document text
    • https://cdn.sqhk.co/bosareke/khfWEAO/kigulezebazewafaw.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/0iigchi/texifoxisejunasalet.pdfIn PDF document text
    • https://cdn.sqhk.co/jujadiziga/bgh2MkF/mofavijufijigevid.pdfIn PDF document text
    • https://pigixona.weebly.com/uploads/1/3/5/9/135986477/475062.pdfIn PDF document text
    • https://cdn.sqhk.co/gedodupem/3ghhe6H/28570508234.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pikiregofi.epizy.com/get_used_to_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/35881280511.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/56211256822.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/curb_your_enthusiasm_theme_trumpet_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/93080362694.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ca1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA1B 5064 bytes
SHA-256: 8e02f25e2c62229ea88217b1c239d56726de516cb2aac66b1945144fea8c6e2a
font_01_sfnt_off0001db61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB61 10456 bytes
SHA-256: 56cce8d31e5b44c7498c19af8ad863e1f82cbefa1fb06764ef96272722feab47
font_02_sfnt_off0001fef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FEF1 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.