Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca85d04b05a1b1b3…

MALICIOUS

PDF

85.5 KB Created: 2021-03-31 17:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b95ece847f3327950ef99c23030dc1c0 SHA-1: 10f78aec1d1ca1ae151a66f1210045043f967e70 SHA-256: ca85d04b05a1b1b3650e190b6fc2f1338937f935a4242235f598b3c68e29780e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://nipisod.ru/wix?keyword=ai+persona+4 PDF link annotation
    • http://libralab.digital/pelpro_pp60_pellet_stove_reviews1vkqm.pdfIn PDF document text
    • https://cdn.sqhk.co/nagotumubo/Aciidhf/betenugarokoke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389354/normal_600d94cb5f36a.pdfIn PDF document text
    • http://lomizagin.iblogger.org/55128410164.pdfIn PDF document text
    • https://cdn.sqhk.co/womafafowix/ejccbhf/laboratory_investigation_28a_earthworm_dissection_answers.pdfIn PDF document text
    • http://lnstagramsupportlives.com/22287897246zfcrz.pdfIn PDF document text
    • http://jibitivi.66ghz.com/financial_reporting_definition_wikipedia.pdfIn PDF document text
    • http://lifeeuro.info/nezotoxanidovar8joun.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/ghc6wjf/67303050094.pdfIn PDF document text
    • http://presentinsta.site/you_are_god_alone_mp3_downloadj8fj9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487906/normal_60226239e90fe.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/81Gjegg/dan_the_man_gameplay.pdfIn PDF document text
    • http://tukameduk.22web.org/zafugemuganuruvizuzupokub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407749/normal_600d8b60ceca7.pdfIn PDF document text
    • http://erethiztzj.space/bikini_body_guide_12_week_resultseijry.pdfIn PDF document text
    • https://cdn.sqhk.co/wejafivelij/zgfjaEA/18265306806.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b049c1a5-d58f-4c10-a5fe-0940f9f492cd/268129415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44a2c123-e62b-458d-b4cd-393be4204146/komimavota.pdfIn PDF document text
    • http://xodezuraweba.rf.gd/undesa_migration_report.pdfIn PDF document text
    • http://kejufunekopal.epizy.com/chord_keyboard_apps_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57c144ce-ff66-467c-886c-ae6c0f86d5b2/jeju_olle_trail_17.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85718077-a6df-43f9-96cf-4d23f228acab/xukezilatorijun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f4bb1a9-65b9-4e91-9482-7cdf2ed8f5ba/feludomogotopaninetog.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_off0000fe35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE35 5832 bytes
SHA-256: af2d3765bf38697623d23a06782e2cb4d28f83bdce4bc1aab9be1b638c3a35cc
font_01_sfnt_off0001127b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127B 4856 bytes
SHA-256: 0ec5938bb36a63df9ee99533de90a19e65f30c0f159297a4d6e3ccc9ddf3a471
font_02_sfnt_off00012313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12313 11376 bytes
SHA-256: 708be526f1a91c028ca1e8114ff9e42293d597e9677d4f0459f11a98649fcdb0

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