Malicious PDF — malware analysis report

Static analysis result for SHA-256 038d78afbbe46369…

MALICIOUS

PDF

63.4 KB Created: 2020-11-10 20:19:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: add5a5e53839321a92c486b75fd1397a SHA-1: 926a3ff4c84f7daaa710046a44dceb9a8e497ed1 SHA-256: 038d78afbbe46369e86602eb0112b03740e6815d2f417579a6fb4faf691560a9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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 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://traffset.ru/strik?keyword=2007+toyota+tacoma+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417405/normal_5f983ca9ea572.pdfIn PDF document text
    • https://zigeginuserepu.weebly.com/uploads/1/3/4/0/134041232/1edd83.pdfIn PDF document text
    • https://juxupadozimufa.weebly.com/uploads/1/3/4/3/134388451/3ff0795aaa7cf7.pdfIn PDF document text
    • https://fozufamegevavup.weebly.com/uploads/1/3/4/5/134586639/3397455.pdfIn PDF document text
    • https://malebikixolu.weebly.com/uploads/1/3/4/3/134358595/1290151.pdfIn PDF document text
    • https://pedudevapo.weebly.com/uploads/1/3/4/7/134719514/lewewugedi_bimox.pdfIn PDF document text
    • https://woxukobu.weebly.com/uploads/1/3/4/3/134392577/8898476.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e342d403-2536-44d5-8faf-b958cd378e19/55120120582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0595f6c-e459-4d1c-b2b5-d8ee41a99502/10957332486.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/39850675470.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_off0000ba09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA09 5388 bytes
SHA-256: 8d7bd128d9df24250cceff61493d988a92a315db429ecdc7de84af6c3be84bff
font_01_sfnt_off0000cc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC63 10668 bytes
SHA-256: 3087f17fc2a96a16516582dcfbb45906f25fa42967fc3488a37be9d7c3a0cb91