Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f75dcb464ca898…

MALICIOUS

PDF

143.3 KB Created: 2021-03-09 16:19:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f5c45964a62b38a821c5d12a6cd3aca SHA-1: 788cdb970214dbaafb528078891515dfd741b102 SHA-256: 29f75dcb464ca898ec6ae39fe0a90a3d5515d58543453f9a48fa3fcbbc65b632
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, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The embedded content, though heavily obfuscated, likely serves to facilitate the distribution of these links, potentially leading to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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://nipisod.ru/123?utm_term=curriculum+guide+in+english+grade+7
    • https://goguribepolim.weebly.com/uploads/1/3/0/7/130739596/1752f34611f9.pdf
    • https://misetibu.weebly.com/uploads/1/3/1/4/131438078/dizizotosamisim.pdf
    • https://wisamifogafize.weebly.com/uploads/1/3/4/5/134598642/mebekedudenot_lujorimegut_dividejawo_fodavax.pdf
    • http://scoretdho.best/cuanto_es_120_gr_en_tazaszyyfv.pdf
    • https://taxurazuzar.weebly.com/uploads/1/3/4/0/134042721/8230641.pdf
    • https://fadufavibog.weebly.com/uploads/1/3/4/8/134889314/xasujukanebepep-xojaxafiga-panuzut-taluwatumoze.pdf
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/nofefozenunak.pdf
    • https://nikudedixipapun.weebly.com/uploads/1/3/4/6/134692686/pojibagijijabaf_jobivijeki.pdf
    • http://kopogaxepaku.sportsontheweb.net/bikoxidugepokigujagasobo.pdf
    • https://morapunepa.weebly.com/uploads/1/3/1/6/131606469/0d83dbb67.pdf
    • http://iclod.tech/caste_income_application_form_in_telanganahgo9v.pdf
    • http://iciko.xyz/kenerosilal1uvhs.pdf
    • http://podonebatimekel.22web.org/2003_dodge_dakota_4.7_engine_oil_capacity.pdf
    • http://ita-talia.fun/jivexomutinomoxpb30h.pdf
    • https://vexefanakaxaki.weebly.com/uploads/1/3/4/8/134871487/cdb7dfcb1.pdf
    • http://lizakoku.22web.org/62417030806.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pazepoxi.atwebpages.com/why_the_rich_are_getting_richer_indonesia.pdf
    • https://uploads.strikinglycdn.com/files/ba695c53-a0c9-4cf5-a6b0-80e7ab302b55/33427774928.pdf
    • https://uploads.strikinglycdn.com/files/8ef5537f-216d-4fa8-bc0c-c26a8f3fe98a/watugu.pdf
    • https://uploads.strikinglycdn.com/files/ef6a6088-ea71-42c8-9cc6-239ae20ccf23/how_many_ounces_is_a_large_sonic_shake.pdf
    • http://wujuxupizosafe.rf.gd/game_templates_unity3d.pdf
    • http://jobagivojik.rf.gd/migimetetepegumakewes.pdf
    • https://uploads.strikinglycdn.com/files/c8c4c9da-b193-4010-877f-d9d8f89024ff/ge_pension_phone_number_uk.pdf
    • https://uploads.strikinglycdn.com/files/6178e215-bd48-44cc-93f5-df95ba9fe25f/the_house_with_a_clock_in_its_walls_movie_review.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f9bd.bin
8380810621881463e60e34a10dfe25547ba4a95610a4defce3d6f8fc50d13a8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F9BD 5336 bytes
font_01_sfnt_off00020bb4.bin
de60fd8cd199d751a2e897f6db9cb80cdf965e8fd37f7beae9cdb0a7aeba722d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20BB4 10416 bytes

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