Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed812d67dbbe30d…

MALICIOUS

PDF

75.0 KB Created: 2021-04-03 06:38:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e9dee88f63780fb55c17c4e413a86fb3 SHA-1: 5354b1eb4526fe8bc27f8d63bb4ccb2fe4bf410d SHA-256: 4ed812d67dbbe30d4f65dd4561fbe0d93875f5d365bd1e131324d10f36c38650
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 0.9995

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://dugedepap.ru/wix?keyword=network+protocols+worksheet PDF link annotation
    • https://cdn.sqhk.co/tedalome/cGlSgik/just_2_pics_level_20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448980/normal_5fe3e8d5eede6.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/hffcggd/51826290498.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450428/normal_5ff7d023676e8.pdfIn PDF document text
    • https://goxatuzibifonev.weebly.com/uploads/1/3/0/7/130739188/kazawapi.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/8khgIRr/34697016451.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/iZHibSm/23850991331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459055/normal_60488e6f08475.pdfIn PDF document text
    • https://rewizefugubopu.weebly.com/uploads/1/3/4/2/134266162/zuwesawaxuma_bisaximozinaxij_fevomovamasupo.pdfIn PDF document text
    • https://komijeji.weebly.com/uploads/1/3/1/6/131606126/1854195.pdfIn PDF document text
    • https://cdn.sqhk.co/jivomawufem/ghgNpfd/download_free_checkers_game_for_pc_windows_10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fezivepe.rf.gd/fimefafewixese.pdfIn PDF document text
    • http://fegumipidibig.rf.gd/lolimujuzapidew.pdfIn PDF document text
    • http://wumawiriwize.epizy.com/zazuwaji.pdfIn PDF document text
    • http://bevivose.rf.gd/pelokajabajojupow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1190bb37-39f4-46c4-82eb-ee6ce18a080a/wabiguxemakirabatinujesib.pdfIn PDF document text
    • http://mulagokonud.rf.gd/zekeberikaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9941916-e4d1-435c-9a5a-102d13336cf4/a_peoples_history_of_the_world_chapter_summaries.pdfIn PDF document text
    • http://tinipukax.epizy.com/beranilurewuxunupizuwonof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2f75c13-58ec-4b3b-89b8-ab1333164953/86359636564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2b1ffef-c472-4de6-94af-fcbd20436631/what_are_the_benefits_of_listening.pdfIn PDF document text
    • http://vodobugatusexa.epizy.com/kivokifepexuwenom.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_off0000ea98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA98 4936 bytes
SHA-256: 623bf7bc1b159ae5091a560f32afbd159d0fc6b9e34897ad063f1553cf529513
font_01_sfnt_off0000fb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7D 10260 bytes
SHA-256: 7989264bf50edbbf9b7e21a509986745e69ce332e5181bd07c09d8de6ad5fe9a

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