Malicious PDF — malware analysis report

Static analysis result for SHA-256 59c9b0ae2dab8bc1…

MALICIOUS

PDF

74.4 KB Created: 2021-02-26 08:21:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3ecad6594fa52f18c8d4ac9276ed8c48 SHA-1: 8e8185c16af69cacf6d33b9ba77f69c87745202b SHA-256: 59c9b0ae2dab8bc10feeebcddbe4c297e31bfeb88475f449d514318e6dc0fb84
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains a large number of external links, many hosted on disposable domains, characteristic of a link farm. The embedded URLs suggest a phishing or scam attempt, potentially leading to further malicious content or exploitation.

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://druttle.ru/123?utm_term=lamborghini+gallardo+superleggera+2008+precio PDF link annotation
    • https://cdn.sqhk.co/likafupat/jhdiiib/25351890112.pdfIn PDF document text
    • https://sugowula.weebly.com/uploads/1/3/4/6/134646485/5332084.pdfIn PDF document text
    • https://cdn.sqhk.co/badiwugaleko/gegcfhc/87826577327.pdfIn PDF document text
    • https://dajurejew.weebly.com/uploads/1/3/4/7/134753869/pokobitilate_matigon_miwizijexebop_gadawarewaw.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/cZjajet/takefaxemabituropidogo.pdfIn PDF document text
    • https://cdn.sqhk.co/vefoveted/qJBZge0/plane_world_war_2_games.pdfIn PDF document text
    • http://fogozuvonuw.66ghz.com/incline_bench_press_form_dumbbell.pdfIn PDF document text
    • https://zademufexek.weebly.com/uploads/1/3/4/7/134765537/zisexiwija.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuwotegof.rf.gd/29735052002.pdfIn PDF document text
    • http://totofexux.epizy.com/chronic_pancreatitis_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/amd_a4-_4300m_graphics_card.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_off0000e0fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FC 6036 bytes
SHA-256: ed6acd094d1831c413dd8eb8c85860cd2e384f19fa99c3d9e9cfe2beab549790
font_01_sfnt_off0000f559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF559 11200 bytes
SHA-256: 34a7807126a659132f271b1e3084f9a5eadeb3378d685b2a564ac5ea818b9672

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