Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bdefbe518b9739b…

MALICIOUS

PDF

67.9 KB Created: 2021-03-15 04:50:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 96bb8928c9e892af926088179283cb4f SHA-1: 56587021bb29e90f070e48894b3da3ab93d09efb SHA-256: 6bdefbe518b9739b10474754d9b6bf23c981236b27b1abb3d5bc842fadf667c0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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 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://jumiwimov.ru/strik?utm_term=when+is+fifty+shades+of+grey+on+tv+uk PDF link annotation
    • http://kiguporut.iblogger.org/16659017721.pdfIn PDF document text
    • https://nawiveburejofi.weebly.com/uploads/1/3/1/3/131381882/mozamitavesakolirefe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414672/normal_600887c565bdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459470/normal_602effe923a45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390659/normal_603a54d79cd78.pdfIn PDF document text
    • https://xivanolub.weebly.com/uploads/1/3/1/3/131380121/xatatuwowolanozas.pdfIn PDF document text
    • http://zodimasar.mypressonline.com/58008670432.pdfIn PDF document text
    • http://wekanisa.scienceontheweb.net/jurajefigif.pdfIn PDF document text
    • https://bigimegena.weebly.com/uploads/1/3/1/4/131438437/3055494.pdfIn PDF document text
    • http://zilitimo.getenjoyment.net/rulalodo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jaziwovapotulit.epizy.com/56576518022.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/xosugupa.pdfIn PDF document text
    • http://pevutedijubixit.epizy.com/dir-880l_firmware_1.08.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/5th_grade_language_arts_assessment_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/the_hunter_s_prayer_full_movie_720p.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7E 5376 bytes
SHA-256: 976ea7cda9ad8ebaa26eb35b7845289a484c82169ac9b6492b54831eab935ec5
font_01_sfnt_off0000dcde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDE 11444 bytes
SHA-256: 73734457a50ceef3b006fb8f2c6872902fec15b4e233f90c957108fda65d2cb4

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