Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bc3e9642347a37a…

MALICIOUS

PDF

70.1 KB Created: 2021-03-19 09:10:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e49701b1fa6fe084bd00655af0908da5 SHA-1: c0182401b9fb743b824214c73910ab1a6eb702ab SHA-256: 8bc3e9642347a37a04d3cb57da59662bea958925398205e57237eb2fd49f4879
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to external domains, with several flagged as unknown or potentially malicious. Heuristics indicate the PDF is a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. The ML classifier also strongly flagged it as malicious. The presence of external URIs suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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://baarspo.ru/award?keyword=baofeng+uv+9r+plus+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/pugirunosamo/fiizhaD/guess_the_movie_with_emojis_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/wofikubid/gjfvljj/seasons_of_warfare.pdfIn PDF document text
    • http://jenerotisa.mywebcommunity.org/dc_metro_map_2020.pdfIn PDF document text
    • http://gejudoxe.mypressonline.com/71459054190.pdfIn PDF document text
    • https://cdn.sqhk.co/mesafovojifo/sgjcagh/62081440296.pdfIn PDF document text
    • http://dmgameplan.com/74702724115z8wls.pdfIn PDF document text
    • http://zuvatewovu.scienceontheweb.net/how_to_turn_off_flash_on_polaroid_sun_600.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/gjhjb7T/earn_recharge_by_quiz.pdfIn PDF document text
    • https://cdn.sqhk.co/febapaji/jifQQtc/poultry_seasoning_vs_chicken_bouillon.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/epson_wp-4020_printer.pdfIn PDF document text
    • http://onlinetiser.website/194712376271t294.pdfIn PDF document text
    • http://ita-women.space/76911209316bqseq.pdfIn PDF document text
    • https://cdn.sqhk.co/ripowusaro/gjXpHji/jamawibibed.pdfIn PDF document text
    • http://lonotel.mygamesonline.org/central_australia_map.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/03b5da80-951c-46aa-ad1c-ab995199dbc4/15652202942.pdfIn PDF document text
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_2da6e6bb1a354172801464a96db23c51.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d3348c4-db13-4b91-a404-9ae6b06a00ef/joy_at_work_marie_kondo_free_download.pdfIn PDF document text
    • https://b73b9701-b1df-43be-b031-73419f87697c.filesusr.com/ugd/bfbd96_0f26752e2cb54705afb6251d66d5979c.pdf?index=trueIn PDF document text
    • https://619c993e-e215-4b07-891b-88776ecab8c8.filesusr.com/ugd/1fce43_03cd3e0b5cbc4589bb4a0f57184b1649.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/97dee469-6e74-48ed-9446-f3a295d1b12d/how_long_is_maternity_leave_in_the_philippines_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc44792e-abf8-4af2-ad02-233fa6dba1fd/spring_mvc_tutorial_free_download.pdfIn PDF document text
    • https://6ba7316d-b84b-4ccb-a32a-103c856d4013.filesusr.com/ugd/91f37e_837c15873c7345739f95ec66739e57b7.pdf?index=trueIn PDF document text
    • https://e028ba52-6c86-493e-86b7-fecf7cd1c3eb.filesusr.com/ugd/bcb9fd_4539a5170ea14748a11c0e7a2e4a3706.pdf?index=trueIn 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_off0000d18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18C 5624 bytes
SHA-256: 05d645d4441d0bbf1ff1bb949a677d0c3376d11e108c5d941949c2aae9dc4c83
font_01_sfnt_off0000e4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A6 10600 bytes
SHA-256: b7223521bf64a98309925d23ab3b551ac1bd15d8476ad54e7c4c0df49df6801b