Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f43f1029d310f3d…

MALICIOUS

PDF

80.2 KB Created: 2021-06-10 05:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3d16fdafb9d9013aa20c906703e4d56 SHA-1: ca9fc619a90055bdbd6ff85838ce3373c5eccd8a SHA-256: 3f43f1029d310f3da1dd3b7af73021e11d929a4b6ad9a8cefd4c4d61b2898c30
126 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains numerous embedded URLs, with a primary one pointing to 'https://krisoc.ru/pbw?utm_term=rescue+for+cats+near+me', suggesting a lure to a phishing site. The presence of multiple disposable hosting links further supports a malicious intent to distribute a payload or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://krisoc.ru/pbw?utm_term=rescue+for+cats+near+me
    • https://cdn-cms.f-static.net/uploads/4463565/normal_6023b7dca2890.pdf
    • https://cdn-cms.f-static.net/uploads/4374373/normal_606781b91dd23.pdf
    • https://dujizajep.weebly.com/uploads/1/3/4/7/134704211/eb7c2f48f.pdf
    • https://cdn-cms.f-static.net/uploads/4409256/normal_6029ab41ef979.pdf
    • https://repositugi.weebly.com/uploads/1/3/0/7/130738607/zemegilasoz_toxulagoxek.pdf
    • https://gokuveseloniku.weebly.com/uploads/1/3/5/3/135309313/kufategurifelel.pdf
    • https://cdn-cms.f-static.net/uploads/4487201/normal_606e232bd804e.pdf
    • https://xatufatug.weebly.com/uploads/1/3/4/5/134597760/ef16baca6.pdf
    • https://static.s123-cdn-static.com/uploads/4481285/normal_5fcd888d90574.pdf
    • https://xumolatakikekum.weebly.com/uploads/1/3/4/3/134335049/1433898.pdf
    • https://cdn-cms.f-static.net/uploads/4486743/normal_600c903276b98.pdf
    • https://fozivumi.weebly.com/uploads/1/3/4/7/134761275/c78ba4518.pdf
    • https://sixemajeka.weebly.com/uploads/1/3/4/6/134633324/kudopugavaxa.pdf
    • https://cdn-cms.f-static.net/uploads/4379964/normal_5fe956aa6c696.pdf
    • https://zajodufukotu.weebly.com/uploads/1/3/1/8/131857357/wudiwu-voruvurez.pdf
    • https://static.s123-cdn-static.com/uploads/4485001/normal_6002565dd351d.pdf
    • https://static.s123-cdn-static.com/uploads/4424672/normal_5fd03bd9dc6a0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://xovakovawup.pbworks.com/f/33265296426.pdf
    • http://muxopal.pbworks.com/f/62498116154.pdf
    • http://kikipudojuzo.pbworks.com/f/toshiba_smart_tv_have_bluetooth.pdf
    • http://tujolim.pbworks.com/w/file/fetch/144708570/covet_fashion_mod_apk_2020_ios.pdf
    • http://faxamom.pbworks.com/w/file/fetch/144472611/how_to_write_car_loan_closure_letter.pdf
    • http://guleribiko.pbworks.com/f/why_does_my_cuisinart_coffee_pot_leak.pdf
    • http://bavudexote.pbworks.com/w/file/fetch/144747498/voxubo.pdf
    • http://mifimoruzuwo.pbworks.com/w/file/fetch/145005402/new_twilight_movie_2019_midnight_sun.pdf
    • http://paditoxef.pbworks.com/w/file/fetch/144884883/suwazozulasogofe.pdf
    • http://movapog.pbworks.com/f/79421867146.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f179.bin
2b59963391b12858f695e45eb81ac11fb8e63a4de7dade768fb4960ed68c506f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF179 4836 bytes
font_01_sfnt_off000101c7.bin
0222242d01c8d2ea667cd8b48229a5976e6341a30c5c4f8b940188149dbe0659		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101C7 10480 bytes
font_02_sfnt_off00012520.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12520 4324 bytes

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