Malicious PDF — malware analysis report

Static analysis result for SHA-256 948f88552e02645c…

MALICIOUS

PDF

72.1 KB Created: 2020-11-12 23:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 00c5c3faa782b07c77c9d05332924b26 SHA-1: 221483e0aa3d663aa6dabc6445668cedf51bddfe SHA-256: 948f88552e02645cd9d942845082e7f643ce1cc5e543680b033bb758275cd919
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 0.9997

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 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/123?utm_term=300+aac+blackout+subsonic+loads PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405194/normal_5f9b7378afaa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421957/normal_5f9f7de025a4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454167/normal_5f9f705ac1ca2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368500/normal_5f92899c1921f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f8c706f88bd7.pdfIn PDF document text
    • https://denasigetul.weebly.com/uploads/1/3/4/3/134332190/gitaximor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393761/normal_5f920e1724d01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463812/normal_5fa3bdaf197d2.pdfIn PDF document text
    • https://susetizumuru.weebly.com/uploads/1/3/4/4/134461935/00b9346c7.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/farowug/the_seventh_man_story_haruki_murakami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d6f508-9688-446d-8386-ec192356d37c/under_armour_dynasty_heatgear_vented_transparent_hoodie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bf9fae7-3530-4817-81a5-fcef9826d103/sims_urbz_ps2_iso.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/convert_100_ounces_to_gallons.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD32 5016 bytes
SHA-256: 35768f594dda82777522e89dbe6e67de65e183d63e3bd178bef3e8307d611d7e
font_01_sfnt_off0000de33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE33 10988 bytes
SHA-256: fe51cb10913d8c2d105221b1c72c84a4ec109c0ce59f52fc21f84c3d33516e55
font_02_sfnt_off000103d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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