Malicious PDF — malware analysis report

Static analysis result for SHA-256 e75bdbcea3edb3d6…

MALICIOUS

PDF

71.0 KB Created: 2020-11-26 01:59:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4ebb2b1739374cca6bf00a2999db7749 SHA-1: 16fbe295989b0da28ab692c874ccf008be06e9c0 SHA-256: e75bdbcea3edb3d6d2113e631b104b0bd54cc5ae89cdbc22ecc4098438fcff5c
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=mayfair+tv+guide+apk+for+firestick PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371514/normal_5fa1858b7bc79.pdfIn PDF document text
    • https://wofenexezut.weebly.com/uploads/1/3/4/3/134310974/512c64c80265569.pdfIn PDF document text
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/7b941b55b9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383475/normal_5f8d39420ff41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379049/normal_5f98489921b8d.pdfIn PDF document text
    • https://malozesa.weebly.com/uploads/1/3/4/5/134505473/favakelebubap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469640/normal_5fb309399ea21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379969/normal_5f9bbc7c25f4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386081/normal_5f9c3b6b7719a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379742/normal_5f8cbf1280fbf.pdfIn PDF document text
    • https://zifupowipowiku.weebly.com/uploads/1/3/4/7/134722678/6923031.pdfIn PDF document text
    • https://wojuguzibuliru.weebly.com/uploads/1/3/4/8/134896427/taverepidusisalob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f9ecd9c37c64.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/dusubonifu/ssc_stenographer_syllabus_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/castbox_apk_mod.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_off0000d6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D0 5520 bytes
SHA-256: a1c38394a39cad599252709476d874e5de6f354eb99ac47d3070eaff003bd5ed
font_01_sfnt_off0000e9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D5 10880 bytes
SHA-256: 286445c18b5371bacbc1d05cb00b06d101c95c2ec70e0b77de544e719db52eb7

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