Malicious PDF — malware analysis report

Static analysis result for SHA-256 d230bad25dba0684…

MALICIOUS

PDF

74.7 KB Created: 2021-03-19 23:25:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4717a68e9639e0da099be2441711e641 SHA-1: ec9f6027efc7ef6f16e22c984ce4f09bb70a59a8 SHA-256: d230bad25dba06844b1a7ac24318cf10d59f669d31c01cabf169d69382ae96ca
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the presence of external URIs and the overall detection profile strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/award?keyword=application+of+computer+in+banking+pdf PDF link annotation
    • http://afracheat5.xyz/formation_bijoux_fantaisie_bordeaux3zbfx.pdfIn PDF document text
    • http://all-casino.xyz/eua4h.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/8gc6gjH/there_you_go_meaning_in_marathi.pdfIn PDF document text
    • http://asia.kiwi/dakunifaknzsr.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/sefuxosufoijl5p.pdfIn PDF document text
    • http://milanbeach.fun/the_chronicles_of_narnia_prince_caspian_full_movie_free_downloadtblai.pdfIn PDF document text
    • http://policyhelpcenter.com/path_to_glory_40kkm2j9.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/W9QjiVQ/kitufapesowaxagiwavi.pdfIn PDF document text
    • http://gayerkan.com/bezoraserenidezakejiktc2z.pdfIn PDF document text
    • http://leyloften.online/guvititemanatoterzenz5.pdfIn PDF document text
    • http://ventager.online/53695971010qt8g7.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/hhdiaR1/laxisavokodudetu.pdfIn PDF document text
    • http://greatholl.com/lopozfwayx.pdfIn PDF document text
    • https://cdn.sqhk.co/vikaxokaso/dRojbhf/julowuruwezaruxatasisen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zumaborelap.rf.gd/fodipesix.pdfIn PDF document text
    • https://1ec9b6e7-17eb-4e1e-a994-ba5ce4cbdb7c.filesusr.com/ugd/d4a9d6_8f7a2b924cec4238ac4a07c9f44b4bbc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/00bd40ee-90b6-4c92-b8db-b1fbb8e738ed/what_is_thrax_supposed_to_be_in_osmosis_jones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3c6d6ee-c90b-46bf-9786-c14972b48ed5/62611305172.pdfIn PDF document text
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_aa50642f4cb24674b070e17dd084a001.pdf?index=trueIn PDF document text
    • http://buvumitibeve.rf.gd/49811086638.pdfIn PDF document text
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_0e9280b62ac143879470281095408bb2.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_off0000e188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE188 5488 bytes
SHA-256: fe13189fb168425c4f4f896b20b224334c8c01b5f0ad2b95097d7a99f10e5446
font_01_sfnt_off0000f424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF424 11980 bytes
SHA-256: 4d1419efb9f5bdba17709433e0061a76f84d2f87e9579e24b8810266549998b7

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