Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45128d99a5b1502…

MALICIOUS

PDF

77.5 KB Created: 2021-03-29 15:27:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 850cd26b81955e0f1e9d25a948120db6 SHA-1: b5a29cca1402f847486f672d1f0003e3e8c454ec SHA-256: e45128d99a5b1502880106167cb6b2e4cae540f9973f91d50dc8d89e129eeb10
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to car seat manuals, likely to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=safety+first+guide+65+sport+car+seat+manual PDF link annotation
    • http://metaleagle.ru/learn_english_talking_app85kib.pdfIn PDF document text
    • http://ionatr.fun/in_truck_driving_games_highway_roads_and_tracksglqog.pdfIn PDF document text
    • http://polnews.xyz/minecraft_1.13_0.13_apk_downloadze08v.pdfIn PDF document text
    • http://republvinb.fun/podizogobutoxe3f0bq.pdfIn PDF document text
    • http://onlinekartiadesi.com/mexuwasanibiletuh9gjw.pdfIn PDF document text
    • http://erogan-encolumbia.site/carte_arduino_unojzp4g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_9a8151cfd01e46498be310232fb9709f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/303cf73a-6703-46d3-9cb5-d29921854d0e/71378179721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee817b82-89e0-4534-9182-13fe70ff8f6b/36818582264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b6187d-9102-4d91-9b3e-3da4fa7afa55/69738698650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16ecc3d9-56dc-4032-8bc4-36777aae4883/uppababy_vista_bassinet_and_car_seat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47437f74-f1e0-4ad4-8d50-ad0958851570/45314493614.pdfIn PDF document text
    • http://sazojojuw.rf.gd/kofisosoxafulelokuru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c084cb1e-d5e1-403a-aebe-d5d6083410a8/tuwubejakomesabiso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b8f723-7d1f-4333-8cc2-abd87bdc5919/average_speed_formula_calculus.pdfIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_abecd94461ec48dcbbb210b0fbd561a0.pdf?index=trueIn PDF document text
    • https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_df65f84696594146aa84d0cd53e17d5f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/08f0ffe7-639f-405a-9c14-cc37b2aaa1e4/what_is_container_name_in_oracle_19c.pdfIn PDF document text
    • http://nibexavu.epizy.com/visewurikilojelop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8391289-1d8c-4e8c-ab05-a7d5e6c03e23/ikea_catalogue_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3c32b98-d074-4d74-8cf0-68c1b34178cb/la_la_land_featuring_yg_lyrics.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EB 5956 bytes
SHA-256: 0c9b2f4458f751feaa3d75e952c55c9b9e098ef7894f094e50027f0178e2d6f3
font_01_sfnt_off00010530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10530 10280 bytes
SHA-256: ef5b5e3d873cc24a8d19736cdd9de0482e6350043c713814327d02447d6884cf