Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0c17950c18a546…

MALICIOUS

PDF

81.8 KB Created: 2021-03-10 16:52:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3e3b966356572201630092b63cd91585 SHA-1: c5ef9f8fd385895150a416d2b8e909188d1760e5 SHA-256: dc0c17950c18a546d5fbd8d0a3003ab1e3e90c685f01e901a60dbf884027480c
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a malicious document designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://druttle.ru/award?keyword=verbe+avoir+present+exercices+pdf PDF link annotation
    • https://cdn.sqhk.co/gobamagedesi/SL4KejF/xexudivikemukem.pdfIn PDF document text
    • https://jasofemelufes.weebly.com/uploads/1/3/0/7/130740231/wufutizapi.pdfIn PDF document text
    • https://rovizefodizare.weebly.com/uploads/1/3/4/3/134309954/mozapofowuwima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452599/normal_6047711ebc394.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495254/normal_5fda6a74b03de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410965/normal_6033a6d965d5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377101/normal_5ff50826a9866.pdfIn PDF document text
    • https://refunijuxi.weebly.com/uploads/1/3/4/7/134748157/1348302.pdfIn PDF document text
    • https://cdn.sqhk.co/xeribaba/djiZ5hf/trap_dungeons_2_pro_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384655/normal_6027f8d14ccab.pdfIn PDF document text
    • https://siximegam.weebly.com/uploads/1/3/1/4/131453251/nijugefup-faxepoki-putojovewebo-xetapenepe.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/RhfYHtw/birds_of_prey_soundtrack_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/geCnQDy/u-_craft_mobile_hack.pdfIn PDF document text
    • https://toromadon.weebly.com/uploads/1/3/4/5/134523466/zesefagazi_kusulexojudoka.pdfIn PDF document text
    • https://xavodumofas.weebly.com/uploads/1/3/4/9/134901052/609e27e203ab15.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/tojexubamixafaxenijasepi.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/linowebunomi.pdfIn PDF document text
    • http://fipaliwabalutu.rf.gd/49407692914.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/how_to_enter_goals_in_workday.pdfIn PDF document text
    • http://sobakijej.rf.gd/44843099043.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/unbleached_parchment_paper_sheets_wholesale.pdfIn PDF document text
    • http://gogobat.epizy.com/carding_machine_electrical_diagram.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_off0000d9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DF 5352 bytes
SHA-256: 0800de54abd3790d2f5a6e3f512748cac3e192d87ffa0f10f03058b282d757d9
font_01_sfnt_off0000ec23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC23 2884 bytes
SHA-256: fce08cb36c02190e5234935b5ce96721ec3e58704b0a10ee1e41e1ff4ce6bd48
font_02_sfnt_off0000f82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82F 12632 bytes
SHA-256: 9406476ba1e21e7440849dff60b8015e201a029cef5831f106907b610652ce54
font_03_sfnt_off00012053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12053 16652 bytes
SHA-256: a9007f0ca23d2c4c235efed143bc7f4b234d1e6a9707810711ba8a29326def0d