Malicious PDF — malware analysis report

Static analysis result for SHA-256 54eae273dd3799d1…

MALICIOUS

PDF

82.8 KB Created: 2021-02-25 16:52:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 01015194b4ae8eea1125fa7f5435e0e1 SHA-1: db44a00873edf5941af628e1ee230db849c39d55 SHA-256: 54eae273dd3799d12f1d832a5faa4442b5d23b69c21be4488d18ac831d351608
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 0.9998

Heuristics 6

  • 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 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://jacksth.ru/strik?utm_term=dell+optiplex+9020+guide PDF link annotation
    • https://melinifijegor.weebly.com/uploads/1/3/4/2/134265386/foberexujege-regelokele.pdfIn PDF document text
    • https://cdn.sqhk.co/malofavu/5APRo7y/wizard_of_oz_costume_ideas_for_adults_diy.pdfIn PDF document text
    • https://derigibi.weebly.com/uploads/1/3/4/4/134447264/83c37c7dc86e8a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475863/normal_5fffc3ead6551.pdfIn PDF document text
    • https://wajajudamivigo.weebly.com/uploads/1/3/4/3/134359543/napawajawugonojej.pdfIn PDF document text
    • https://lisiruzefixa.weebly.com/uploads/1/3/4/4/134495270/557942.pdfIn PDF document text
    • https://cdn.sqhk.co/dexizajifu/brWhaig/bearded_dragon_names_from_movies.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385026/normal_600323868752c.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/DhfjjlD/mod_ben_10_gta_sa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455208/normal_601219a0a94bd.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/hgeghUU/nakepisipimolidanagazo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_5fe66708e9fb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378382/normal_601105425f2dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/juvetaso/berejaxobenugazuseli.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/malwa_express_12919_bhopal_platform.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/chipotle_chicken_nutritional_information.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF868 4916 bytes
SHA-256: b8ae476f86725111aa94cf44bc1caa501fd755de0a5402e9b31601a77a6ae669
font_01_sfnt_off0001094a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094A 11692 bytes
SHA-256: edb12e6432ca71dcef12bce1381efb323b590a2d5538f3bb63374d5f2474c505
font_02_sfnt_off00013031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13031 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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