Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a261754745d6433…

MALICIOUS

PDF

84.1 KB Created: 2021-03-23 01:06:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 781b2a2993671eeb412f0a2eb3e5a20c SHA-1: 11c9acadd1f3f0f018e99efad76f01255459f921 SHA-256: 9a261754745d643376dc69da72e2af401f694cb045bc4d2edb4ac3db7ce5d20e
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 domains, suggesting a link farm or phishing lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating an attempt to create a deceptive link structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/wix?keyword=easy+rooting+toolkit+apk+2017
    • http://xuxetosufuzo.getenjoyment.net/acido_fosforico_formula_di_struttura.pdf
    • http://shtancircul.site/chrome_for_windows_server_2019bang1.pdf
    • http://winfreeiphone.xyz/how_to_thread_bobbin_brother_hc1850wgye9.pdf
    • http://artdebug.site/refuwoxugolodaladac4cm.pdf
    • http://leledup.mypressonline.com/2015_troy_bilt_bronco_parts_diagram.pdf
    • http://ceter.xyz/1063074808iq9it.pdf
    • http://onlinetiser.website/the_lost_heir_dragon_rider_guidez5xxu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c8183ac3-396f-49ea-865c-1a4ba05982a2/how_to_get_a_replacement_identification_card_online.pdf
    • https://d73c234d-0e3d-497d-8108-d5659bace061.filesusr.com/ugd/58a813_cbbfd10730f24512ab916cc33b6c199a.pdf?index=true
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_0654ac30c114489ebfa210a30f4be97c.pdf?index=true
    • http://ligoroxenafof.atwebpages.com/wordly_wise_3000_book_6_lesson_6_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/06674697-87ba-4674-827b-2f8de0f0ff08/the_chocolate_war_vigils_quotes.pdf
    • https://uploads.strikinglycdn.com/files/5e5869fc-0d23-4f71-aa6a-6193618dbba1/tatezidajadefexoworo.pdf
    • http://wevisoxa.epizy.com/moto_g6_phone_case_uk.pdf
    • http://pijedawometuzov.epizy.com/tutorial_bizagi_espaol.pdf
    • http://xasagode.myartsonline.com/what_is_cos_tan_sin.pdf
    • http://fojosotum.myartsonline.com/butene.pdf
    • https://uploads.strikinglycdn.com/files/8f7f1fb7-9bca-4a26-bc92-297987a3043f/shark_navigator_swivel_pro_2xl_reviews.pdf
    • https://uploads.strikinglycdn.com/files/7170eb75-fea5-4c2b-a9a4-f2fc7968adee/how_to_factory_reset_an_ellipsis_tablet.pdf
    • https://025b4bf0-2906-4f5f-8a0f-6d4b68fc9518.filesusr.com/ugd/148ee2_b4c882e598884bff9ba76d82dea2138c.pdf?index=true
    • http://lawaxisagiwog.atwebpages.com/ccnp_route_642-902.pdf
    • http://bodegifu.atwebpages.com/roland_barthes_the_eiffel_tower_and_other_mythologies.pdf
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_2a00f1888ce044d69b4387651fd8ef99.pdf?index=true
    • http://nejesezape.myartsonline.com/46544846687.pdf
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_5f9f00bd7d32439b9d5c2bc0cabc57f7.pdf?index=true
    • 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_off0001093f.bin
cf6326ade1db5a99f0576af9477bb2ba6e279e66be2656710752c94bc61400a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1093F 5516 bytes
font_01_sfnt_off00011c2e.bin
47920e1a33871cb40a76c079fb50ad449d86cc747035ea758ec7e5a5d7df70b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2E 11812 bytes

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