Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad946bfc31d080e…

MALICIOUS

PDF

77.4 KB Created: 2021-03-08 00:43:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d09421af48918e262fb6ae847c47189b SHA-1: b036269d335fb214ca2b6f0911d93a7c52cb541f SHA-256: 0ad946bfc31d080e4da4cc36579fb89f248bc9dbd0075b234fbc16420b9261eb
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to lure users to malicious sites.

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://xajibur.ru/wix?keyword=winter+jam+2020+sonoma+raceway PDF link annotation
    • https://cdn.sqhk.co/kewudomavave/TRpUdws/40332999627.pdfIn PDF document text
    • http://look-hotel.com/zetodunqi9y.pdfIn PDF document text
    • http://filanion.online/2014_honda_cr_v_lx_owners_manual0tj35.pdfIn PDF document text
    • http://nigufuf.iblogger.org/reliability_test_spss.pdfIn PDF document text
    • http://trickyturkey.com/quadrafire_pellet_stove_parts_in_canadakifyk.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxabofapuw/gd8Wngf/80314307278.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/ejbbHNu/vogezabujajawinona.pdfIn PDF document text
    • https://cdn.sqhk.co/vivutazawi/gioWIgf/how_to_play_spider_solitaire_online.pdfIn PDF document text
    • https://cdn.sqhk.co/fezivabuja/e7A9jgh/spirit_riding_free_wall_decal.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/8jb1H7g/dragon_golf_course_las_vegas.pdfIn PDF document text
    • http://diwokaxojizo.iblogger.org/toefl_practice_test_with_answers_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/black_s_law_dictionary_2018.pdfIn PDF document text
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_6186b919178048f492e78097df8e01fd.pdf?index=trueIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_e8d796f8942840d283301d7ecce6f503.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/gikodex.pdfIn PDF document text
    • https://b1f0a730-f0e4-4bcf-918d-a915077b90d0.filesusr.com/ugd/a7c69d_ba763768f1e648a2a4f2fc89abd3ad91.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/xeronopafuxifugekexiwujez.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/commerce_department_steel_report.pdfIn PDF document text
    • http://latisikonif.epizy.com/fifelisipidaf.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_off0000f232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF232 5472 bytes
SHA-256: 96f2e798c8523708f25d1d08ba6291c09beb1d1312d37bf0558cd5f52839619e
font_01_sfnt_off000104d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D3 10472 bytes
SHA-256: d153e8cf673d62fe8f1539245513b3dfa86a7dae325cdbc2ef86e363cfc9c97c

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