Malicious PDF — malware analysis report

Static analysis result for SHA-256 576c44df97d2afee…

MALICIOUS

PDF

77.9 KB Created: 2021-04-16 17:31:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c72c55477022d2bd5322a17641ec4f30 SHA-1: 15bfb7a2d8a43e94d8b8e7ef91424366c2038dec SHA-256: 576c44df97d2afeeea9e0146f9b6123a7bdd6ec165197a0c33c25e5baef7ce1e
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=can+roku+streaming+stick+be+jailbroken PDF link annotation
    • http://tronreserve.online/73800622245nxekf.pdfIn PDF document text
    • https://sibevuguz.weebly.com/uploads/1/3/4/8/134859718/5086467.pdfIn PDF document text
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/vivewi.pdfIn PDF document text
    • https://rebageronamit.weebly.com/uploads/1/3/0/7/130775484/2962255.pdfIn PDF document text
    • http://tiktokhd.design/harry_potter_and_the_sorcerers_stone_full_movie_castm36sy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_605aaf2f114cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449998/normal_5feb041041a44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420588/normal_6068ab9c01a80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493545/normal_604b4ecb08680.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418584/normal_60090c612eeb3.pdfIn PDF document text
    • https://jetovalanowu.weebly.com/uploads/1/3/0/7/130739462/geweli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423188/normal_5fc94fe303349.pdfIn PDF document text
    • https://zugimawaxudal.weebly.com/uploads/1/3/1/4/131410952/vozupafobona.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368996/normal_602c11dc8638a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mibelajute.epizy.com/4536238780.pdfIn PDF document text
    • http://muxobuduxude.epizy.com/centos_directory_server_administration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/what_is_the_moral_of_the_fable_of_the_tortoise_in_things_fall_apart.pdfIn PDF document text
    • http://vavuzudimolig.rf.gd/43223141442.pdfIn PDF document text
    • http://bodapefazit.rf.gd/autoroute_2013_gratis.pdfIn PDF document text
    • http://dupumimegijema.epizy.com/acgih_tlv_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/balkh_province_map.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/riwavi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF166 5304 bytes
SHA-256: 5c394b46d246367ff342292c6c064688a0493e22420ab20624778f5aaa5d81e9
font_01_sfnt_off00010365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10365 11932 bytes
SHA-256: b9e30a02d7c39223938fabbadd4b793181f6f11cb06a918779a498102c5cd720

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