Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8754a501589d6cd…

MALICIOUS

PDF

75.9 KB Created: 2021-06-05 03:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9eff7ffec78217a8e655a8eb38740eb2 SHA-1: 70ce9fc56ce4cc011ad75f6c797712624406abec SHA-256: b8754a501589d6cd3c4ec108d287f6ec308804d732f61be35fd94827f43390d1
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 0.9993

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://infrive.ru/pbw?utm_term=mash+cast+members+still+alive PDF link annotation
    • https://wimowago.weebly.com/uploads/1/3/0/7/130775393/legatigavemekim.pdfIn PDF document text
    • https://xomadugazulu.weebly.com/uploads/1/3/4/5/134597447/4936753.pdfIn PDF document text
    • https://mevonupimiluge.weebly.com/uploads/1/3/4/5/134527198/zumapirufununeri.pdfIn PDF document text
    • https://menudapopejit.weebly.com/uploads/1/3/0/7/130775932/xukoluvazewit.pdfIn PDF document text
    • https://ginegumogigoxi.weebly.com/uploads/1/3/2/8/132816185/ravus.pdfIn PDF document text
    • https://xuxulavadimuxa.weebly.com/uploads/1/3/4/2/134234789/9413420.pdfIn PDF document text
    • https://lezojefob.weebly.com/uploads/1/3/5/3/135319065/4724261.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zotugon.pbworks.com/w/file/fetch/144636141/31313287667.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec979161-07ba-4662-a378-1004fc3b4e63/dazivevegorebowifubi.pdfIn PDF document text
    • http://dejulagimu.pbworks.com/f/5791261244.pdfIn PDF document text
    • http://xujefix.pbworks.com/w/file/fetch/144576549/38371716090.pdfIn PDF document text
    • http://rixepal.pbworks.com/f/nintendo_3ds_emulator_apk_for_pc.pdfIn PDF document text
    • http://podimil.pbworks.com/f/avtech_h_264_dvr_firmware_upgrade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e807057a-4f53-43cb-b731-cbfcc499503b/how_much_does_a_lab_tech_make_a_year.pdfIn PDF document text
    • http://bujolajoxek.pbworks.com/f/rivomonapolabodog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84238954-1016-477a-86ee-ff50406e7055/lenovo_t420_4gb_ram_upgrade.pdfIn PDF document text
    • http://mumubib.pbworks.com/w/file/fetch/144413319/52491265280.pdfIn PDF document text
    • http://jabodawo.pbworks.com/f/cpc_practice_exam_2020.pdfIn PDF document text
    • http://papoxuva.pbworks.com/f/how_to_give_a_swedish_full_body_massage.pdfIn PDF document text
    • http://kakexigodelo.pbworks.com/w/file/fetch/144544740/geneser_histologa_4ta_edicin_gratis.pdfIn PDF document text
    • http://memofemovo.pbworks.com/f/cimarosa_oboe_concerto_in_c_minor_sheet_music.pdfIn PDF document text
    • http://sowenux.pbworks.com/f/cryptography_and_network_security_by_william_stallings_3rd_edition_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/514b846c-cdba-4644-b184-e61a45021658/wizivaxowonuwusebap.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_off0000ebb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB2 5244 bytes
SHA-256: f1461a32d466e9acd92323cfef599421d8b901161f8af89c3d8debae0bb70f71
font_01_sfnt_off0000fd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6A 11008 bytes
SHA-256: fa9815c5ec375f755ef7c9c6f39c478cf09aeb2200b479ddc473e532a9eb3ba3

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