Malicious PDF — malware analysis report

Static analysis result for SHA-256 d480d089411c978f…

MALICIOUS

PDF

64.9 KB Created: 2021-01-22 01:08:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 30f6ca3cd64c76047d0b6de0584753b2 SHA-1: e88f156bfec867c0efd370dd7e4af2e75ba8449b SHA-256: d480d089411c978ff8dc1fb5a931e6d1e4fa5314dda8330a03c7ce19c6262dd0
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous external links, many pointing to S3 buckets, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lead users to compromised sites.

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://bologen.ru/wb?keyword=pvr%20cinemas%20movie%20tickets PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379987/normal_5fe2de384785f.pdfIn PDF document text
    • https://fileduwefevara.weebly.com/uploads/1/3/4/3/134384607/d662943c93.pdfIn PDF document text
    • https://site-1245363.mozfiles.com/files/1245363/ariel_little_mermaid_coloring_sheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412582/normal_5fe705824f41a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376098/normal_6009fa16348ec.pdfIn PDF document text
    • https://zapineri.weebly.com/uploads/1/3/4/7/134707132/1633256.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368770/normal_5fc729ad26b58.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/gazijewevan/tesivugetumalivuweg.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/hangman_game_ppt_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/ziworojanujimijif.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/girl_woman_other_by_bernardine_evaristo.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/resume_templates_generator.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_off0000c1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B4 5036 bytes
SHA-256: a8f2fcd919f90be49f8fb71173f283428ec17d97ac7b98f9f43536029af29220
font_01_sfnt_off0000d2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C8 10444 bytes
SHA-256: b757e56bdf4d59d256ee3dd566c47e35200c24468b6e6fb342f23ce20f1e8152

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