Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6eac7f19fcb0931…

MALICIOUS

PDF

74.5 KB Created: 2021-05-30 03:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7b768922124f4681e8037f45af9aa101 SHA-1: 1a9adaab504c77b099a1d1a0be8fb6b20ffa45f5 SHA-256: c6eac7f19fcb093170f55aee4a9f41544a5db56c5b42ffc4826a6d48ed0c1065
186 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 6

  • 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.
  • 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://leonvi.ru/strik?utm_term=new+printhead+for+kodak+esp+3250 PDF link annotation
    • https://kelotodunuri.weebly.com/uploads/1/3/4/5/134576270/a72dfa.pdfIn PDF document text
    • https://ladunibik.weebly.com/uploads/1/3/4/0/134096621/d1f0fd4a2.pdfIn PDF document text
    • https://sasanufodokedu.weebly.com/uploads/1/3/0/9/130969760/beturasijeguk.pdfIn PDF document text
    • https://sipekenatevare.weebly.com/uploads/1/3/4/7/134776107/nogosagurag_fonibepe_xefewevotow.pdfIn PDF document text
    • https://darurirajilubi.weebly.com/uploads/1/3/4/3/134318819/8245956.pdfIn PDF document text
    • https://xinefozi.weebly.com/uploads/1/3/0/7/130775465/gowotififo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413851/normal_601c01ebbc531.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422168/normal_60054a74eb1da.pdfIn PDF document text
    • https://dubiroki.weebly.com/uploads/1/3/1/4/131483307/desekudepebe.pdfIn PDF document text
    • https://sozejelef.weebly.com/uploads/1/3/4/6/134600180/7992474.pdfIn PDF document text
    • https://zapilututok.weebly.com/uploads/1/3/4/3/134341349/516560.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416327/normal_60557e6777bdf.pdfIn PDF document text
    • https://ralutadepijug.weebly.com/uploads/1/3/5/3/135305627/4c649bde2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450160/normal_605c9771761cf.pdfIn PDF document text
    • https://pogipusuzifu.weebly.com/uploads/1/3/4/8/134869227/9574793.pdfIn PDF document text
    • https://mazemisa.weebly.com/uploads/1/3/4/6/134692176/8175496.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489848/normal_601b01d8cbec2.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/9773b114-91a7-4306-89bc-7c51734c4727/33176064702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e78ee919-d3a4-4f90-b78e-e48fe5f1ac6e/what_is_selective_perception_in_organizational_behavior.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff1ee8b5-4c30-465f-819c-b287b4da6d7a/tufavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce17fe98-69b5-4452-94e5-ed290626f784/iron_man_2_video_game_apk.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_off0000e5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D2 5784 bytes
SHA-256: ed2e78b984208e0df953915775610641cb1678c3aa83c328f4f702dda1d9a1d3
font_01_sfnt_off0000f99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99E 10404 bytes
SHA-256: 7ebf2a18e71a1fc11d46ccffd07b34caa2cf1110165de41eecb1d216df513925

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