Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf74d9211188f0f…

MALICIOUS

PDF

87.5 KB Created: 2021-06-11 14:31:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce3d6edd21696f84e9e08064f0c323ab SHA-1: 0ee74e91b2fdf4595ecdcfd0927bfe7682928c65 SHA-256: ccf74d9211188f0fe3c18f92564d298cc915fda68e5462794f3fe93c7e6b1b99
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing attempt. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO spam tactic. The primary external URI points to a URL that appears to be a lure for downloading a hack for 'Asphalt 8', indicating a social engineering pretext. No scripts were extracted, but the PDF structure itself is used to host numerous links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://oniceh.ru/pbw?utm_term=asphalt+8+hack+free+download
    • https://cdn-cms.f-static.net/uploads/4418566/normal_60158c6c2a989.pdf
    • https://kogemujifogez.weebly.com/uploads/1/3/4/3/134344524/vebodumelizag.pdf
    • https://static.s123-cdn-static.com/uploads/4388037/normal_5fdf8a765be18.pdf
    • https://pukewuvidepuf.weebly.com/uploads/1/3/4/3/134321324/piwasodabegusirale.pdf
    • https://jobufuxaxaxugo.weebly.com/uploads/1/3/4/8/134854920/1969949.pdf
    • https://cdn-cms.f-static.net/uploads/4421939/normal_601b567ece495.pdf
    • https://cdn-cms.f-static.net/uploads/4374968/normal_60127637a8f28.pdf
    • https://cdn-cms.f-static.net/uploads/4412403/normal_6018535e480ae.pdf
    • https://cdn-cms.f-static.net/uploads/4403534/normal_6065f682ef498.pdf
    • https://static.s123-cdn-static.com/uploads/4409255/normal_5feed2c906813.pdf
    • https://cdn-cms.f-static.net/uploads/4446015/normal_602ce44da9472.pdf
    • https://static.s123-cdn-static.com/uploads/4503874/normal_5ff257d2d6d41.pdf
    • https://static.s123-cdn-static-d.com/uploads/4473384/normal_60b086fcc0fbb.pdf
    • https://judurufag.weebly.com/uploads/1/3/4/6/134688768/basowutajejigijuvu.pdf
    • https://wapixetisabin.weebly.com/uploads/1/3/4/6/134685373/zelegebopikawigawuni.pdf
    • https://pemimitajeli.weebly.com/uploads/1/3/0/7/130739011/78b9c72c6.pdf
    • https://bomevalaruzaf.weebly.com/uploads/1/3/4/8/134871705/609824.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://togiwuvoze.pbworks.com/w/file/fetch/144468201/rutolakoxof.pdf
    • http://jakomija.pbworks.com/f/physical_pharmaceutics_1_mcq_with_answers.pdf
    • http://tuxafivimit.pbworks.com/w/file/fetch/144879780/mxq_tv_box_firmware_update.pdf
    • http://najapenoz.pbworks.com/f/bawakiwerolukeju.pdf
    • http://mukibilevejo.pbworks.com/f/how_to_noclip_in_geometry_dash_pc.pdf
    • http://vawaguzidatu.pbworks.com/f/gilasofa.pdf
    • http://zezimin.pbworks.com/f/apple_watch_series_5_44mm_cellular_price_in_canada.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_off0001082e.bin
2a08565847fec6bb66336a62a458c3139e6a04f0089618b38b1e541554184c04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1082E 5320 bytes
font_01_sfnt_off00011a41.bin
32a12caaa035df3b123b0b02a8719014dcd4c4a9b151b7d686e94a2be82069a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A41 11180 bytes
font_02_sfnt_off00014087.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14087 4324 bytes

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