Malicious PDF — malware analysis report

Static analysis result for SHA-256 997f7d15674c53c1…

MALICIOUS

PDF

94.3 KB Created: 2021-03-20 14:29:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bac52b1c3e0af871d65933c102583fa2 SHA-1: c30c3743e8ec83fa4d4fe40834e285256e1a2398 SHA-256: 997f7d15674c53c1b59d15778b12642356129661415ccc5a65aabe866bcd4e57
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/strik?utm_term=how+to+put+on+the+armor+of+god+daily PDF link annotation
    • http://manekobe.22web.org/bombay_velvet_full_movie_hd_720p.pdfIn PDF document text
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/gezejajele_jixasetumepilus_vewajo_kikekabip.pdfIn PDF document text
    • https://jijelejo.weebly.com/uploads/1/3/4/5/134590633/1456002.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454691/normal_602b4b24448ee.pdfIn PDF document text
    • https://cdn.sqhk.co/terodekijur/ch6Cc9r/fojoviworazeveredo.pdfIn PDF document text
    • https://novigavaze.weebly.com/uploads/1/3/0/8/130874354/kuwamiv_masakureri.pdfIn PDF document text
    • http://fafemezu.22web.org/the_magic_school_bus_full_episodes_original.pdfIn PDF document text
    • http://lujadexezusunam.22web.org/sap_crystal_reports_runtime.pdfIn PDF document text
    • https://cdn.sqhk.co/sufiwotag/Q0ghhHl/15153573144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471085/normal_5fda199a8f140.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/zHPjaBY/economist_world_in_figures_2020.pdfIn PDF document text
    • https://xabonawof.weebly.com/uploads/1/3/5/9/135965837/xitofufaziwudefaviwa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_cc5af7368e7c47e2aeb739f04987910b.pdf?index=trueIn PDF document text
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_9d1eb360caa144f08a9f907a7ec6b7aa.pdf?index=trueIn PDF document text
    • http://jerolap.rf.gd/cognitive_behavioral_therapy_for_ocd.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/xoromiwirigu.pdfIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_d8420e638aff491cbdc1f7c010d3c12f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/american_football_shoes_vector_free.pdfIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_d4aa1c98fe2a42178b99b2e649ed6389.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_off00013470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13470 5432 bytes
SHA-256: 747c05c169c7ff895a2aece8c6f936f08c1185bf99cdff8c2b0dc2402ab6b83b
font_01_sfnt_off000146db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146DB 11112 bytes
SHA-256: 688eccc362aae9dd51059913d2367fd75bacbb0ceaa1824d487d9cf7bbfdc062

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