Malicious PDF — malware analysis report

Static analysis result for SHA-256 470bcd1aef3655ee…

MALICIOUS

PDF

79.2 KB Created: 2021-02-16 11:40:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e30980d25eb44dcea75053ea0e812084 SHA-1: ba05c15827f8c8339eb2eec3fc5fc4c7882de041 SHA-256: 470bcd1aef3655ee0bb992a2c1eaea84d0f97130d7f060ee1df5890fe9bfe0b8
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one pointing to a suspicious domain ('maypoin.ru') that is likely part of a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further suggests a deliberate attempt to create a link farm for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/123?utm_term=ib+examination+timetable+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390092/normal_601f0d02571fd.pdfIn PDF document text
    • https://lasasokuvob.weebly.com/uploads/1/3/1/6/131607269/4016261.pdfIn PDF document text
    • https://cdn.sqhk.co/wefegiwezon/heJiclk/kits_de_barcelona_para_dream_league_soccer_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377128/normal_602addc74c3bd.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/emgjvid/1410054429.pdfIn PDF document text
    • https://xasukibumit.weebly.com/uploads/1/3/4/7/134749231/3603675.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/EfGjeBb/summer_sports_events_hack_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465398/normal_5ff82c567d024.pdfIn PDF document text
    • https://vazigawexike.weebly.com/uploads/1/3/1/6/131606690/4266238.pdfIn PDF document text
    • https://cdn.sqhk.co/zonurubo/h7hfidm/tekiroruwojeti.pdfIn PDF document text
    • http://kpovli.ru/auto_call_recorder_android_apkcp08o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501789/normal_5feb97247e8ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380858/normal_601a843db012e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425255/normal_5ff978d3bcc7f.pdfIn PDF document text
    • https://komamezumef.weebly.com/uploads/1/3/1/3/131398541/2337291.pdfIn PDF document text
    • https://kexexetipo.weebly.com/uploads/1/3/4/8/134897314/2797609.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/sajatofubote/40945970793.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/33794697676.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/vifovusikumazomaretawekiz.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/tizanimobajapev.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_off0000ed40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED40 4764 bytes
SHA-256: a30b758cef403fe16760fe34fd33f53848b6747266de0c534ca08ec2f91dc5c4
font_01_sfnt_off0000fd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD54 10500 bytes
SHA-256: 83d866fe4a4f8064edadcc69eaef42ad52f2bf4236af18993bc9e577560875db
font_02_sfnt_off0001211f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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