Malicious PDF — malware analysis report

Static analysis result for SHA-256 d65cbb3b8f21e22c…

MALICIOUS

PDF

73.0 KB Created: 2021-02-21 18:54:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 67f4632624091e632c9387114d50bfa7 SHA-1: 28a244a10d952cc619acedbdd61fbd2314f895fa SHA-256: d65cbb3b8f21e22ca688db318304989f304aa3cdb73a46cf3fb96fcb4044d5d8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, indicative of a link farm designed to redirect users to malicious sites. The presence of external URIs and the ML_NYX_PDF_MALICIOUS heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://baarspo.ru/strik?utm_term=dressmaker+sewing+machine+vintage PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495244/normal_5fc5ed8d7d2ca.pdfIn PDF document text
    • https://tiwebusimevadeb.weebly.com/uploads/1/3/5/3/135346158/jusetinunegamag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454422/normal_5ff260d1decea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464722/normal_5ff0d2f8bcc49.pdfIn PDF document text
    • http://radanews.site/zerebujoq1qp2.pdfIn PDF document text
    • https://wazaxilam.weebly.com/uploads/1/3/4/7/134726650/79283.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402707/normal_5fcea67fba61f.pdfIn PDF document text
    • https://cdn.sqhk.co/xenekifa/hvggiam/create_marvel_comics_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/dewobube/jbig0jf/96139457598.pdfIn PDF document text
    • http://shoop-fp.ru/71964992595m96yb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450003/normal_5fe6df23e4a23.pdfIn PDF document text
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/3706085.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzufoxo/Eaiayja/68703960510.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/rebomedug/wonufegexe.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/76323712953.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/wivemiboteloxop.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_off0000e19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19C 5396 bytes
SHA-256: 743ef16201482d0429c85087f92eaf7a3f888d0c4446867308d5a834348e8f94
font_01_sfnt_off0000f3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EF 10376 bytes
SHA-256: 50ad5882739299bfbea88ae33bcc244b78b24f1f2d15f074500cec97864fd293

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