Malicious PDF — malware analysis report

Static analysis result for SHA-256 90c7ddd2ed049a9b…

MALICIOUS

PDF

76.5 KB Created: 2021-03-24 17:15:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ad2fc49665d6e8baa7b9ad5b77a6e103 SHA-1: d241a9c4cc7792b9a9012f92e4a453b9fae6e066 SHA-256: 90c7ddd2ed049a9befb1567649bf45a3f4169f9763135fc9e1c625de21e51f00
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The document body, though partially garbled, suggests a lure related to 'Avicenne energy pdf'. The presence of external URIs and link farm heuristics points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/award?keyword=avicenne+energy+pdf PDF link annotation
    • http://puvinizozibejir.mygamesonline.org/bogoroditse_devo_rachmaninoff.pdfIn PDF document text
    • http://odemebayisitrafik.com/how_to_ask_for_a_letter_of_recommendation_for_scholarship_samplejq8c4.pdfIn PDF document text
    • http://digitalmicroteter.xyz/kill_the_dictator_trailer8ypiw.pdfIn PDF document text
    • http://nitanupemil.mygamesonline.org/19145951161.pdfIn PDF document text
    • http://sfr-espace.best/cen-_tech_p35017_multimeter_manualogbuo.pdfIn PDF document text
    • http://tajezedireg.iblogger.org/46553355553.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rodedewezijore.atwebpages.com/69578227877.pdfIn PDF document text
    • http://bizedesaxifu.onlinewebshop.net/hp_laserjet_p3015_printer_error_49.4c02.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/specialized_cycling_shoes_size_guide.pdfIn PDF document text
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_7c545eff00074db8b1469a3cc311d12e.pdf?index=trueIn PDF document text
    • http://subokud.epizy.com/kavum_uteri_y_formunda_ne_demek.pdfIn PDF document text
    • http://xesijapapun.rf.gd/jedutaxa.pdfIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_01669e53db6247d1a7d06da11fff7911.pdf?index=trueIn PDF document text
    • http://zapumodexajo.rf.gd/buderus_logamax_u042_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/62027028984.pdfIn PDF document text
    • http://luvojidepezepag.epizy.com/apowersoft_review.pdfIn PDF document text
    • http://lexalerov.rf.gd/ewi_5000_setup.pdfIn PDF document text
    • http://sukokovevaz.atwebpages.com/base64_image_to_php.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/muwudi.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_off0000edfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFD 5056 bytes
SHA-256: 1cbb4672615ec91e7c5bd23e0bac512f26cc79425f93499200d84a9f8d0efb22
font_01_sfnt_off0000ff56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF56 11036 bytes
SHA-256: ed3c99884ca1c99f7f3c6081e60955e885c4f0d6316db941351573fc25e3fec7

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