Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c15463a11ec43f2…

MALICIOUS

PDF

71.0 KB Created: 2021-01-08 18:03:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d494817474c220b13627a8c7eeb7e374 SHA-1: 078aada73f85677d34b552f77382563fe9c05af1 SHA-256: 7c15463a11ec43f2fa5d589c29d702ccbe739c07870d4802833395c30c2b6d0d
126 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 by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary external URI pointing to 'trafftec.ru', likely serving as a lure for users seeking 'impossible quiz answers'. The document's structure and numerous links suggest it functions as a link farm designed to redirect users to potentially malicious content.

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://trafftec.ru/aws?utm_term=impossible+quiz+answer+49 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385847/normal_5fe3f16d73b0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450883/normal_5ff448ae7427e.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/KVmihjj/noloboxafageziw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382406/normal_5f8ccab586c16.pdfIn PDF document text
    • https://xesexudojol.weebly.com/uploads/1/3/4/8/134883831/pabawopi-setafujebunuva-padokuzaluka-sulitozilo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482629/normal_5fc6a0d974c42.pdfIn PDF document text
    • https://nafuxiba.weebly.com/uploads/1/3/4/0/134097784/xipuvosabu.pdfIn PDF document text
    • https://xataramev.weebly.com/uploads/1/3/4/3/134320843/fuxeti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5f89fe3837e36.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/jerugus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384316/normal_5fc746d8b74d7.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutazomaga/jhwhdy9/safiwijuwikes.pdfIn PDF document text
    • https://xexafuru.weebly.com/uploads/1/3/1/0/131070851/275405.pdfIn PDF document text
    • https://vujanakisa.weebly.com/uploads/1/3/4/4/134401771/cc7cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369310/normal_5fc601861f4f2.pdfIn PDF document text
    • https://supokiroxuleniv.weebly.com/uploads/1/3/1/6/131606692/pumabemuvewewev_nuragejojolaba_datisexaku_wedapiwa.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/4f141f63-93ed-483e-925f-06d5bfd0da79/orange_colored_traffic_sign_means.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_off0000d7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DF 5556 bytes
SHA-256: c4295e7ecca01d3fa954a51730cb8a8c85ea1e9dea6fd1ef964d0f39066b92ac
font_01_sfnt_off0000eac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC8 10664 bytes
SHA-256: ffe67459aaa0c3be53fa210fd14ddecacde48dcbcbb089ebe3b8d1f4c5fec50e

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