Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b74e38c59755f5…

MALICIOUS

PDF

88.5 KB Created: 2021-02-15 15:24:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65ec869b450d6ae9b5458eda4d2a04ab SHA-1: 9a93dc05f6bcdbe43f55ab09358d6268b6192c9c SHA-256: 00b74e38c59755f5c39e4e164f210482a528346fc83947f20db0633685ae798e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a primary focus on a URL that appears to be part of a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=santa%2527s+surprise+preterite+and+imperfect+tense+worksheet+answer+key
    • https://cdn-cms.f-static.net/uploads/4413982/normal_601b5f3801049.pdf
    • https://cdn.sqhk.co/pimidima/jagchjE/wadur.pdf
    • http://xubixaxar.22web.org/32523443879.pdf
    • https://cdn-cms.f-static.net/uploads/4408589/normal_5fd2a4946db98.pdf
    • https://static.s123-cdn-static.com/uploads/4385887/normal_6003d45d60605.pdf
    • https://dodoxatufasiw.weebly.com/uploads/1/3/2/6/132681482/begane.pdf
    • https://static.s123-cdn-static.com/uploads/4456999/normal_5fca09f6c4508.pdf
    • https://cdn.sqhk.co/tisewesir/jbhijih/origami_instructions_step_by_step_easy.pdf
    • http://fusobilel.iblogger.org/adorn_garland_font_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tokit/accouchement_definition.pdf
    • https://s3.amazonaws.com/pusolefosex/15336598636.pdf
    • https://s3.amazonaws.com/zuniverijesud/activesync_android_version.pdf
    • http://fusopub.rf.gd/heavy_birdtalker_sheet_music.pdf
    • https://s3.amazonaws.com/pibabopuduj/64741821172.pdf
    • https://s3.amazonaws.com/napisakaluja/34663597752.pdf
    • http://lizolubemerawi.epizy.com/99947150092.pdf
    • https://s3.amazonaws.com/jukezeluf/factorization_worksheets_for_grade_4.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b23.bin
70bd09e94da4496be62fadea09520a2b5bd50df22dbbb2c576f5f150df1d2b93
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B23 5756 bytes
font_01_sfnt_off00012eb5.bin
ec70fcaa09baa7be99834b550c6c7880f8e4ed9f6318586af37d9562890aea97
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB5 10856 bytes