Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c2257e74c24315…

MALICIOUS

PDF

78.3 KB Created: 2021-03-03 20:51:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1f1394f269795d1870c80e92f6178bbe SHA-1: dc4833f4facd82b67ba13a405bfb642ad80fc376 SHA-256: 39c2257e74c24315799ca6db7550eec0b140f6ac83389fba179495ce942f8838
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, with a primary focus on 'seumenha.ru', indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://seumenha.ru/strik?utm_term=metro+extension+los+angeles PDF link annotation
    • https://cdn.sqhk.co/turanexode/gih0hJV/risolufujedor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417429/normal_60111e2aa7506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390999/normal_601d9fee5e924.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/hgLhg7x/vativisativo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465257/normal_603289f104e5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414332/normal_600f9e0a39579.pdfIn PDF document text
    • https://cdn.sqhk.co/wufotubi/aJgeUjg/magolara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377931/normal_60127bf1c7324.pdfIn PDF document text
    • https://cdn.sqhk.co/pugudanirav/usidgi5/ribejipobowagamitakejo.pdfIn PDF document text
    • https://cdn.sqhk.co/nufomewo/gdghhgY/nopusezitedu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453885/normal_6018d50c220cf.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/1idBTwA/happy_wheels_race_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456399/normal_5ffabd29d9de3.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/4heoMid/merge_dragon_event_strategy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488604/normal_5fe57af71204f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/bbc_iplayer_vpn_not_working.pdfIn PDF document text
    • http://runexodaluxova.epizy.com/xuduvumudidumewirixu.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/bloons_td_4_apk_ios.pdfIn PDF document text
    • http://wekujugom.epizy.com/mortgage_broker_fee_agreement_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/types_of_coliform_organisms.pdfIn PDF document text
    • http://gedikoti.epizy.com/romilegeb.pdfIn PDF document text
    • http://lufafutogixafu.rf.gd/dawidotilaf.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_off0000f4fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FE 4928 bytes
SHA-256: 34992e6eb5c1a840ff3e9cd6fca621073e340e05b56b2989014e7cc23291a43d
font_01_sfnt_off000105dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DC 11200 bytes
SHA-256: fb0b5018834d743d9437a8f6f970fbd8db52e7917b6b6d2f495767e91bf0c7bc

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