Malicious PDF — malware analysis report

Static analysis result for SHA-256 1717940830bfd2f8…

MALICIOUS

PDF

66.9 KB Created: 2020-12-31 19:56:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 91df6cfff3a1a70fd9147c16d154ce1d SHA-1: 9edea167ae34b2b6555e80b0e474f62e75a27a60 SHA-256: 1717940830bfd2f8bd828ded07e00b6cbd7df2197a794c9ae0c260580efd972d
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The document contains a link farm with 26 external links, many pointing to disposable hosting services, designed to redirect users to potentially unwanted software downloads, as indicated by the 'looney tunes dash apk unlimited money' search term in one of the URLs. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=looney+tunes+dash+apk+unlimited+money PDF link annotation
    • https://bosijoputa.weebly.com/uploads/1/3/4/3/134317673/rizagowe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5f892b5e87d66.pdfIn PDF document text
    • https://sunakolezapomuj.weebly.com/uploads/1/3/4/6/134698053/4441403.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374188/normal_5fce8b23ae260.pdfIn PDF document text
    • https://nodararikerat.weebly.com/uploads/1/3/4/8/134885074/fipejidizarolixiwog.pdfIn PDF document text
    • https://tezadogiva.weebly.com/uploads/1/3/4/5/134522012/rurotovo.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/PwYejia/best_music_player_program_for_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/zedazisem/hhhjpje/starlink_internet_speed_upload.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/iiRa3ta/69306531241.pdfIn PDF document text
    • https://cdn.sqhk.co/gupetipek/9iaqgjf/snake_world_record_game_cool_math.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/batagebexi.pdfIn PDF document text
    • https://zaluvunikuf.weebly.com/uploads/1/3/1/0/131070459/56597f4526cf1c.pdfIn PDF document text
    • https://cdn.sqhk.co/milevatomog/j5hcgj3/19252340763.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC41F 5208 bytes
SHA-256: 09e37377e39b80cafcf8a51f9dd0791f7baec45bdf3582b25c53d7e720a2d285
font_01_sfnt_off0000d5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C0 12796 bytes
SHA-256: df643dba88e94a538002ca9f12318d5bbd6459bc97ea9b78183e3f5e21d6f934

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