Malicious PDF — malware analysis report

Static analysis result for SHA-256 202900c058a1e3c8…

MALICIOUS

PDF

71.7 KB Created: 2021-03-13 16:57:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b207662e44762fc527cfb1a618bfe88 SHA-1: 15a54bf6352e6e4a6fa62961048e4d1568ba283b SHA-256: 202900c058a1e3c8977dc2a83c7a1b057ee4b8ef900c3d5b91c41c9c980d1425
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'Wordscapes answers', likely a lure to attract users searching for game solutions.

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://dafemum.ru/123?utm_term=wordscapes+answers+level+1386
    • http://mobufuwiwid.medianewsonline.com/bow_tie_pasta_and_sausage.pdf
    • http://kogowetek.getenjoyment.net/36856546789.pdf
    • http://all-casino.xyz/basic_construction_materials_8th_edition_downloadi90xp.pdf
    • https://cdn.sqhk.co/juxerawabuf/hsjiihc/lumepunorexaridomiminik.pdf
    • https://cdn.sqhk.co/malofavu/ADhhSDZ/30878649396.pdf
    • http://gisaxisiburu.66ghz.com/chintakayala_ravi_songs_please.pdf
    • http://skidki-day.shop/46403032340q0gaj.pdf
    • https://cdn.sqhk.co/modajili/hjsuDQZ/gamefly_ps5_pre_order_shipping.pdf
    • http://girlsbeach.space/green_bay_packers_se36zc.pdf
    • http://dajexori.mypressonline.com/67754886963.pdf
    • https://cdn.sqhk.co/nuvuvidova/iauquHl/19283372238.pdf
    • https://cdn.sqhk.co/naziwixolagu/egfhhDz/dasitozejukexotabaximofol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tikofaketonub/6304288321.pdf
    • https://s3.amazonaws.com/bidemewufa/gewojuzifiz.pdf
    • http://sonazawokog.rf.gd/attestation_assedic_papier.pdf
    • http://fuluxewamotate.atwebpages.com/kegoburexexutuxabexepar.pdf
    • https://s3.amazonaws.com/zijivevip/53780411626.pdf
    • https://s3.amazonaws.com/legesiliv/zivaxedawoxozagukega.pdf
    • http://wenibeliso.atwebpages.com/11664692553.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9b2.bin
d27abf14e617de6b0738fa680d2136cdba1c517ed716238647917f1512ef027f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B2 5796 bytes
font_01_sfnt_off0000ed99.bin
dac4eafa7a8a6ba6828dfcf9ade51bb985e4c3babc5587baeeab87a0b4481886		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED99 10540 bytes

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