Malicious PDF — malware analysis report

Static analysis result for SHA-256 326393d3e7e88d36…

MALICIOUS

PDF

71.4 KB Created: 2020-11-12 17:56:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4222f88735307a78229ba0993cf587d0 SHA-1: 97f633b6d58f07b196374a65cafd61350b276cf7 SHA-256: 326393d3e7e88d365480396559d9d79867eda57bc92ed3b853fc591f90bf00e0
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://trafffe.ru/123?utm_term=tipos+de+vientos+en+cadiz PDF link annotation
    • https://tunomofezu.weebly.com/uploads/1/3/2/3/132303147/200800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_5f88998831ac4.pdfIn PDF document text
    • https://jovavogi.weebly.com/uploads/1/3/4/5/134597399/puzes.pdfIn PDF document text
    • https://najatiwexit.weebly.com/uploads/1/3/4/0/134041182/4019114.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413842/normal_5f9999b6227aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_5fa5a3d193ce4.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/caa64.pdfIn PDF document text
    • https://dajedenutiwifux.weebly.com/uploads/1/3/4/3/134318988/kopififaw.pdfIn PDF document text
    • https://sakuvajavabese.weebly.com/uploads/1/3/1/3/131383602/sepulizebiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454049/normal_5fa7801cd236c.pdfIn PDF document text
    • https://metumarexidema.weebly.com/uploads/1/3/4/5/134591821/735897.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/liwafo/divergent_parents_guide_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/ll_words_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/72928533955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20dc85b6-e276-4f7b-8f58-09ac8a635f4e/59782857013.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/fiduraguze.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE02 4784 bytes
SHA-256: 38b759e97a6e4609353c75d81cb9d0f894ffd5933afb12fa41e0e64870b59689
font_01_sfnt_off0000de5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5A 11164 bytes
SHA-256: 21c3b088c0386ad4cc5e3867a6077f776121dae79f818fc62c9c90d6b2813e2b
font_02_sfnt_off000102b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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