Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5e8a277de29cf7d…

MALICIOUS

PDF

68.2 KB Created: 2020-12-25 00:48:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0f222418674896cda65652288e65b074 SHA-1: 948154889048430595faa847208f4c572a633ef7 SHA-256: b5e8a277de29cf7d40da60c5cb4ebb288192decfee4d6e3fc20db79213f14292
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafficel.ru/strik?utm_term=ordinance+or+law+coverage PDF link annotation
    • https://cdn.sqhk.co/kafekata/gjgieKL/kinosagonuzutawugalirek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408704/normal_5fa3a240f0e68.pdfIn PDF document text
    • https://cdn.sqhk.co/bexexoro/DicwVqq/screen_stream_mirroring_app_for_pc_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pitewomepe/SSdu0hR/13428370785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370762/normal_5f916243c169f.pdfIn PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/c26c56bce08.pdfIn PDF document text
    • https://cdn.sqhk.co/dujujema/cfiijgo/siren_head_sound_effect_roblox_id.pdfIn PDF document text
    • https://cdn.sqhk.co/jisogixij/hhhbTij/xakepavusobubaxula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417537/normal_5fd884564138e.pdfIn PDF document text
    • https://cdn.sqhk.co/faresawuf/igeqghJ/rinajev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384633/normal_5fbf5364da598.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446930/normal_5fe51190c0118.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/894147fd-ad15-40ba-a292-20449f82b4ad/jibozoguzokizomoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5de77fd-a50d-46af-a991-276cc9012504/34901513848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88cc5daf-88f5-45fe-bfe9-a3bf6bc70570/gomav.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_off0000cd49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD49 5108 bytes
SHA-256: 762fe297c33b2cac03d3b24fe4eb3cdf933ba9418199bf0c27992e3799d107f0
font_01_sfnt_off0000ded0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED0 10836 bytes
SHA-256: 947588cf11235a8cee5918384c3fdfd40ec249202eba9558ec9757ca0abe21ee

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