Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda677d15389a051…

MALICIOUS

PDF

80.2 KB Created: 2021-01-25 15:45:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ee4e1bec11394d85335bed3a261cdbb5 SHA-1: be411e81d77cf907c42b0bcfd7805a6e0e19f1c3 SHA-256: cda677d15389a051bef7c4c6a7628fda66cb8ea86af42254b3de1d221b3d203f
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, suggesting a phishing or malware distribution scheme. The presence of 'utm_term=minecraft++mods+pc' in one URL indicates a lure to attract users interested in gaming content.

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://trafficel.ru/aws?utm_term=minecraft++mods+pc PDF link annotation
    • http://italy-small.space/petrolhead_paradise_hack_iossw2do.pdfIn PDF document text
    • http://austritkfa.com/gigusefedepigesolesnnl8.pdfIn PDF document text
    • http://idealslimitaly-ufficiale.site/does_sup_game_box_have_pokemonk0w4h.pdfIn PDF document text
    • http://begdas.space/62320175697ptnep.pdfIn PDF document text
    • http://nicepics.xyz/wazuniserqu8w.pdfIn PDF document text
    • http://bupro.asia/xigikavuvutotawuzibimxzbq.pdfIn PDF document text
    • https://pidumiwululixew.weebly.com/uploads/1/3/4/0/134095913/surexinadowulurek.pdfIn PDF document text
    • http://teplotronic.ru/11997802579w77rh.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/UCL4bgg/9651389234.pdfIn PDF document text
    • https://rinixupikexem.weebly.com/uploads/1/3/4/0/134096042/nagugufajadupo-goketu-labelifikijo.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/igXgiif/luwujirowivevipepez.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/j0ZB6gc/freeze_dried_cat_food_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/wezufunin/ihaQHEu/stardust_dragon_wallpaper_hd_1080p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://momoxorepuvo.epizy.com/visesezi.pdfIn PDF document text
    • http://fibalikirikoti.epizy.com/state_of_homelessness_report_2017.pdfIn PDF document text
    • http://sakigekoxigukil.epizy.com/gazepafopuminusinaxodazar.pdfIn PDF document text
    • http://lulevewutowa.epizy.com/34008838935.pdfIn PDF document text
    • http://xapimiwosusuv.epizy.com/maya_wrap_deformer_paint_weight.pdfIn PDF document text
    • http://mewexudidis.epizy.com/vb._net_2017_express.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_off0000fc64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC64 5276 bytes
SHA-256: 65cd770e012d7161cf8a98f4867b6403fb33f66b204a4c9d505fe5740687c82a
font_01_sfnt_off00010e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4C 10952 bytes
SHA-256: e441b4c9ea55e2f7894394775f5bfcf0c5c4f80f6ba3ed3e3bb7fc3a56926027

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