Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb38162bcd93ee4…

MALICIOUS

PDF

68.9 KB Created: 2021-03-08 06:56:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 468af894c104d15cac84b7812b8f72d1 SHA-1: b065de9999e20065b62b70520e104508d88f5bcb SHA-256: 9cb38162bcd93ee4f87d57a694a0659b7d2ce292b80d74cd0b08128fd8864b8f
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 pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, contains references to popular content like 'pelisplus.tv apk' and 'marvel_comics_online_subscription_uk.pdf', indicating a lure to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/wix?keyword=https+%252F%252Fwww.pelisplus.tv+apk PDF link annotation
    • https://cdn.sqhk.co/bemememu/PBqifhb/marvel_comics_online_subscription_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/pategazikiw/ie8xEif/candy_smash_game_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367275/normal_6036a26b9fe08.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/fiahhgg/97639715779.pdfIn PDF document text
    • https://cdn.sqhk.co/dagizonu/9YMgjjj/22342620307.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/Ihg1Vjh/80160500135.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/dnrymgk/the_stackyard_surgery_grantham.pdfIn PDF document text
    • https://cdn.sqhk.co/setuboluraje/hkMBPjb/red_and_blue_jordan_11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420747/normal_600828a2ea530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374198/normal_6024caa46e233.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/zikivapuwiwakimaj.pdfIn PDF document text
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_ba07ab92853049688964449fac3ba050.pdf?index=trueIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_e13377e02ab944d4bbcaaf8c08f44070.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/maniac_magee_summary.pdfIn PDF document text
    • https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_89f59322384541218b07f508c544b0f9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/14872259778.pdfIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_90d2f3610c3d4335ae56d328191bd579.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/nelipuwuximumaduf.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/2021293360.pdfIn PDF document text
    • https://0f285ee0-1b14-49a2-8a3e-060a2db94812.filesusr.com/ugd/4bf67f_e69d4a100bcb4961875ad238b4757a74.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_off0000d260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD260 4960 bytes
SHA-256: e5b87f794c48d430dc3cb613b19c3bddae450e996470c67c19ab0aaae0cbe8ed
font_01_sfnt_off0000e37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37C 10148 bytes
SHA-256: 7533cfa26fb031a0f8452bfe8878b6dddd437965eab405642aaf67211316bb0c

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