Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aacf70f1275b39f…

MALICIOUS

PDF

80.5 KB Created: 2021-03-27 22:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d4524e241ac3e222c3a64d0127874467 SHA-1: 2178380c492317e5c47e6d42fa68187ccf5418fc SHA-256: 7aacf70f1275b39f7b3d2a4e33517539cc2fa12bc921d1090e30f7b16addd88e
66 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a malicious lure. While no scripts were extracted, the high ML score and the nature of the embedded URLs indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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/123?utm_term=walt+disney+world+star+wars+guided+tour PDF link annotation
    • http://hotita.space/47462295677co4oo.pdfIn PDF document text
    • http://getyourscore.info/dell_active_stylus_pen_pn350mq5nt7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405641/normal_605329dc2143f.pdfIn PDF document text
    • http://olivamebel.com/hexahexaflexagon_templateq7zhf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388065/normal_6012778174b2f.pdfIn PDF document text
    • http://lefibipefazefep.mypressonline.com/ccna_voice_certification_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_6010f240d10e9.pdfIn PDF document text
    • http://jurojegame.getenjoyment.net/codices_latini_antiquiores.pdfIn PDF document text
    • http://zobevewobuka.22web.org/laserjet_pro_mfp_m125nw_user_guide.pdfIn PDF document text
    • http://stavki-na-sport.site/91485555256mfwfk.pdfIn PDF document text
    • http://pawomodom.medianewsonline.com/criminal_law_in_english.pdfIn PDF document text
    • http://piguzipudoval.iblogger.org/how_to_start_fo4_dlc.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/why_are_the_van_der_waals_constants_a_and_b_different_for_each_gas.pdfIn PDF document text
    • http://ecoservice-vlad.ru/jafulopo15cvw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467318/normal_601e27adda730.pdfIn PDF document text
    • http://zeludupixejufi.medianewsonline.com/couper_page.pdfIn PDF document text
    • http://fagumawegoleleb.mypressonline.com/71820964541.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://a80c0318-1640-4d50-a016-df037fc402b9.filesusr.com/ugd/895bef_8ca7f143c5f5479980e962c6393f74de.pdf?index=trueIn PDF document text
    • http://xefiposokupama.myartsonline.com/saturated_steam_and_superheated_steam.pdfIn PDF document text
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_2fcfd711eace45c8902f7241d9ec91cf.pdf?index=trueIn PDF document text
    • http://texavit.epizy.com/akilandakodi_brahmanda_nayagan_movie.pdfIn PDF document text
    • http://totoxosogazu.rf.gd/animals_coloring.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA2 5080 bytes
SHA-256: 8da7cc5bda4d3f47b454e91c98b6162592e85a4432a19287678c7f277ff366f4
font_01_sfnt_off0000fe0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0E 11312 bytes
SHA-256: 019e56aeffcd6e64a275c65b8b3de52bb255340eaca2f2963aa636668c437d4c
font_02_sfnt_off000124a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A9 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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