Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b959dddc40e08b…

MALICIOUS

PDF

90.8 KB Created: 2021-03-28 16:28:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: b12efba79b3052b654be82e3c1aa357d SHA-1: 49526057a07b2b9aeead903ef8288a1c02403c29 SHA-256: e9b959dddc40e08b34299334d2b49db291b4552ea32f0ce9f72d64fd678e5e3d
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, with a high concentration on disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and a link farm heuristic indicates a probable phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://xajibur.ru/wix?keyword=heat+calculations+worksheet+%25231+answers PDF link annotation
    • http://podipotekoi.ru/control_systems_inc_buford_ga3yivq.pdfIn PDF document text
    • http://kindraretterath.com/wash_out_hair_dye_for_brown_hairihpy4.pdfIn PDF document text
    • https://dakewamegiru.weebly.com/uploads/1/3/5/3/135305658/9d724005f47ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490129/normal_6046d20b7784f.pdfIn PDF document text
    • https://cdn.sqhk.co/dizirajeb/bgjihgB/incivility_in_the_workplace_ted_talk.pdfIn PDF document text
    • https://tejifogigevavep.weebly.com/uploads/1/3/4/6/134675995/4123b1d9a29c50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422382/normal_60570583801bd.pdfIn PDF document text
    • http://thefortykuti.com/life_fitness_95t_installation_manualb2e9d.pdfIn PDF document text
    • http://manaluw.iblogger.org/open_the_bottle_video_song_kannada.pdfIn PDF document text
    • https://cdn.sqhk.co/wefonasifaza/Kgephif/talking_flowers_maldon_phone_number.pdfIn PDF document text
    • http://tiwilib.iblogger.org/how_to_fix_missing_desktop_icons_in_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuzedu/h7sghii/wijejifi.pdfIn PDF document text
    • http://hs-life.ru/black_and_decker_battery_operated_edger6r7xi.pdfIn PDF document text
    • http://studytogether.fun/13444040790tgsyp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499329/normal_5feb7cf784b79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413865/normal_6055fb5f0e527.pdfIn PDF document text
    • https://cdn.sqhk.co/famuxina/jdiajdp/37219849199.pdfIn PDF document text
    • https://milajibejo.weebly.com/uploads/1/3/1/8/131871424/zinatura.pdfIn PDF document text
    • https://lefafikof.weebly.com/uploads/1/3/0/9/130969708/govalupidapu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418558/normal_602f46a85e84f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zafijukopa/74924681798.pdfIn PDF document text
    • http://peneperu.epizy.com/aruba_networks_ap_105_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/puzajegoderenaluxawubumol.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/uppercase_cursive_handwriting_practice_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/valgus_deformity_foot_icd_10.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/44878429907.pdfIn PDF document text
    • http://watotiwima.rf.gd/37722219157.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10209 4884 bytes
SHA-256: 6463961eb9f695fbbe15bbd398847275aef6a2da6c44d1c6faf2464a20cae3b7
font_01_sfnt_off000112a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A1 11316 bytes
SHA-256: 77895a6dd90f827ddb41b8afed34637ad96827364fe24b8dee2bf4c0d2b69092
font_02_sfnt_off00013958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13958 16172 bytes
SHA-256: 7bb20bb306747be2d0b7c98c4825884d4f884f4ee6b1f47b8304df2d605da775
font_03_sfnt_off00014e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E78 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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