Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1dee7a8c3166275…

MALICIOUS

PDF

93.4 KB Created: 2021-05-17 15:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9db76719eb7f605f48b1f0a9a6b14599 SHA-1: 3ad7b485a4acafc25b9eface44123abefdb2fbe0 SHA-256: e1dee7a8c316627548d6f2ac38e53c07d63ecd13d14a25ff5677f06c84773163
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to website creation, further supporting a phishing or malware distribution motive.

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://jacksth.ru/strik?utm_term=how+to+create+website+using+wordpress+step+by+step+pdf PDF link annotation
    • http://idealica-italiaoficial.site/john_deere_6410_repair_manual9636r.pdfIn PDF document text
    • http://healthytrands.com/what_natural_remedy_will_kills_toenail_fungusv68kr.pdfIn PDF document text
    • http://all-gopro.com/how_to_unlock_craftsman_circular_saw0k20k.pdfIn PDF document text
    • http://meetsalon.xyz/how_to_reset_kenmore_elite_smartwash_quiet_pak_9vskau.pdfIn PDF document text
    • http://brumbum3.xyz/81112196502ph94v.pdfIn PDF document text
    • http://znohist.site/fepilegudefal7kigy.pdfIn PDF document text
    • http://vsedlyatebya.xyz/minecraft_earth_map_download_1._12._27kyn5.pdfIn PDF document text
    • http://kukushpa.fun/99787031440y5ws4.pdfIn PDF document text
    • http://prolac.ru/latest_pokemon_game_for_android_freeuv4qp.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/1cc7c116-523b-4f88-ab15-55fc4c9c8772/hansel_and_gretel_movie_2015.pdfIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_4c090b0fac4140db98bf9c80bfebc5ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/kaniripubegezoxudekabiged.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d1cc9a6-29af-4967-b515-4aa0b654f3f2/19408634882.pdfIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_aa59ae2e39b8480493213c3a47a81eba.pdf?index=trueIn PDF document text
    • http://napizexem.rf.gd/when_was_my_remington_speedmaster_552_made.pdfIn PDF document text
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_770f7559bea840ab868cc01f2df7efdb.pdf?index=trueIn PDF document text
    • http://mulagokonud.rf.gd/96883805141.pdfIn PDF document text
    • http://salogun.rf.gd/95067410143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0fdf925-d9a6-4e26-8bb8-8c3da3292ebc/dipoxereposabimajugemaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/pogotapivujisa.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/how_to_lower_tuition_costs.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11824 5584 bytes
SHA-256: b8654ad062ca82f488272aa4271211c1ce41d483c96767d8aee9d890f84023fc
font_01_sfnt_off00012b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B3E 11360 bytes
SHA-256: e10bb2a62fbc429c278f8059b1684321c83998569b7a19adb9b44d1c3767489c
font_02_sfnt_off000151e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151E6 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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