Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff2ae44dbffa8c06…

MALICIOUS

PDF

75.5 KB Created: 2021-01-30 19:48:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 203620a81a9065a82d06295ad630f25c SHA-1: 245b117d4bce565759afaf858ff84c483483e879 SHA-256: ff2ae44dbffa8c060be3fb403c7a85616d342d790bd43d41f92f4ba8a0ba3594
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to disposable hosting domains, suggesting a phishing or scam attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document as a link farm on disposable hosting, reinforcing the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=application+letter+for+nursing+school PDF link annotation
    • http://discount50.pro/superhero_costume_camera_photo_maker_app1i896.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/gjhinmj/jerofisobozeku.pdfIn PDF document text
    • http://wetikufuwigiwox.iblogger.org/atp_challenger_calendar_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxapivasif/dheggP0/38226083304.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/jozihQv/xuwodevedimeroninotogita.pdfIn PDF document text
    • http://fupomogusi.22web.org/nebofo.pdfIn PDF document text
    • http://siteninovubaba.22web.org/juduniweraj.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/ibDiiic/birotatar.pdfIn PDF document text
    • http://youla-24.cc/safe_4.6_scrum_master_exam_questions_and_answersaeon6.pdfIn PDF document text
    • https://cdn.sqhk.co/mepowokugo/icLLqmI/ludo_movie_cast_name.pdfIn PDF document text
    • http://thiswaytovogue.com/real_drift_car_racing_game_download_apksywpv.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/M4Sidmd/kedopewetaritiboneweb.pdfIn PDF document text
    • https://cdn.sqhk.co/tamurikubol/bv3jajj/sliters_hardware_lakeside_montana.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/cv3BgfE/wrike_remote_project_management_pros_and_cons.pdfIn PDF document text
    • https://cdn.sqhk.co/felodunom/rhgY0ig/domino_falling_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/dij4sec/60535957575.pdfIn PDF document text
    • http://onlajn-kassa.ru/mukewizuymp5q.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/dhcXbxk/zonubutinonogovevemis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://remofexemuja.rf.gd/college_admission_essay_format_template.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_off0000ed0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0F 5264 bytes
SHA-256: 1569a02e75a08420b4c565dc26d8cbb39717aba93e223d5ebc2f520d970f2ef1
font_01_sfnt_off0000fef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF1 9940 bytes
SHA-256: 225950f28d5254d02efda29ca504c44948c84c7e0e5f17b58e3ffff131e71890

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