Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f16235d9d17811…

MALICIOUS

PDF

87.2 KB Created: 2021-02-18 18:17:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 235e0f47d9937c765c88bcab1f449b09 SHA-1: d298fef23ef62a553d827940be5ba8b83a2c877c SHA-256: 29f16235d9d17811aec56ba13c1d5202560207ebbce2de593213f361f7cdae7c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a mass of external links, identified as a link farm, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. ClamAV detected this file as a phishing trojan, and the ML classifier also flagged it with high confidence. No scripts were extracted, but the sheer volume of outbound links is highly suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=who+wrote+nfl+primetime+music
    • https://cdn.sqhk.co/pibegufuxova/hhg0o8k/fiselegas.pdf
    • https://cdn.sqhk.co/rukeditele/dHojegg/alien_invasion_movie_2019_review.pdf
    • http://fortuneo.best/aula_de_violo_para_iniciantes_gospelg8kua.pdf
    • https://static.s123-cdn-static.com/uploads/4457561/normal_5ff82dc40248f.pdf
    • https://vuzaruluweketex.weebly.com/uploads/1/3/4/4/134478477/8359505.pdf
    • https://cdn.sqhk.co/pigexebobe/gSBYidS/actc_racing_apk_hacked_download.pdf
    • http://jutereli.iblogger.org/windows_10_1903_version.pdf
    • https://cdn.sqhk.co/vujixete/ihzhccJ/amazon_prime_music_vs_unlimited.pdf
    • https://rolowuwojudazap.weebly.com/uploads/1/3/5/3/135302881/vofidotegova-wobejuximutati-lotobozene-puvufoped.pdf
    • https://cdn.sqhk.co/lutadamafe/gjFjaib/daily_checklist_printable.pdf
    • https://cdn-cms.f-static.net/uploads/4388598/normal_5fd608ed1a60d.pdf
    • https://rixemovupel.weebly.com/uploads/1/3/1/6/131606965/1725608.pdf
    • https://cdn.sqhk.co/fovipobex/veijcpZ/98979193809.pdf
    • http://verification-help.com/python_2._7._15_64_bit4v7n7.pdf
    • https://cdn.sqhk.co/tibakekavero/y3hfjeQ/40233059559.pdf
    • https://cdn-cms.f-static.net/uploads/4414514/normal_5fd1c9f720783.pdf
    • https://cdn-cms.f-static.net/uploads/4419633/normal_601b6787eeee2.pdf
    • https://niritopep.weebly.com/uploads/1/3/4/6/134634222/tukeli-xoxanabogeta-vitepamu-sobunixawudu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b8a.bin
ee4da3e4f23680f5f60e22b6027f8269844ee3a657abb10cbf3d7b425a567e74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8A 5032 bytes
font_01_sfnt_off00011c95.bin
5b9d5354880c67342c9abb85972963e5075df728fce0232c0b12c31febea00a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C95 10844 bytes
font_02_sfnt_off00014133.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14133 4324 bytes

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