Malicious PDF — malware analysis report

Static analysis result for SHA-256 798feb212079688b…

MALICIOUS

PDF

80.5 KB Created: 2021-03-01 13:53:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f77ebe91671f0299e135e6ab73c8a3a8 SHA-1: 965fb688ba03f4a61085a1fcb7a2b0ea624fcba9 SHA-256: 798feb212079688b310c7c428a347d298da7eef8e1c0514c3e94f98cd0422f44
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic firings and numerous embedded URLs suggest a phishing or scam attempt, where users are directed to external sites. The document's structure, identified as a link farm on disposable hosting, further supports this attack pattern.

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://xezojetit.ru/strik?utm_term=how+to+diagnose+dishwasher+pump
    • https://static.s123-cdn-static.com/uploads/4383586/normal_5ff6c6f3529c2.pdf
    • http://genoray.pro/50461606908a3tzw.pdf
    • http://copyrightsupportforlnstagram.com/avatar_movie_in_tamilrockers._lvv2ivl.pdf
    • http://anrostore.ru/air_masses_and_fronts_review_worksheet_answer_key4f884.pdf
    • http://bioforce-co.site/onkyo_tx-nr_636_4k_einstellenouhkg.pdf
    • http://azalea.store/hobart_1612_bladewvo7z.pdf
    • https://cdn-cms.f-static.net/uploads/4485693/normal_60331ef0726ff.pdf
    • http://samelike.site/chasni_song_mr_jatt._comhhnlu.pdf
    • http://tameenegypt.com/how_to_say_rainy_day_in_japanesey36fi.pdf
    • https://cdn-cms.f-static.net/uploads/4382197/normal_60185b656d29e.pdf
    • http://cardioactiveuficiale.site/ponto_de_encontro_student_activities_manualjfxdy.pdf
    • https://cdn-cms.f-static.net/uploads/4366347/normal_6024406b1124a.pdf
    • http://shop-onlinediscount.xyz/94916422621gjfpu.pdf
    • https://zavisedifigi.weebly.com/uploads/1/3/4/3/134316550/fabit-jofegok-guxopotogovu-koxanojumin.pdf
    • http://genoray.pro/bovijagukisnqan9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://faleferesevo.onlinewebshop.net/rukuronumetu.pdf
    • http://sajoveguduv.onlinewebshop.net/36975516684.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_off0000fd18.bin
0d048da5043ae7f627217aa62b8e5ad98c5c324d0a58d777f0fe11de07ab762e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD18 5392 bytes
font_01_sfnt_off00010f58.bin
40068b06ab73c300027f95ec5f7661ca62219e026c76b8dfe4297bec4527e15e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F58 11332 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.