Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fce50cf0e0fc8a7…

MALICIOUS

PDF

83.3 KB Created: 2021-03-23 10:02:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ce4605de3190eda291452ed9f7a48350 SHA-1: 4fe5979a227d26890333bf52eeb8b1ec29089c4b SHA-256: 0fce50cf0e0fc8a7b42f1b00c2d0e0a8b79dff9bebf0d50414c40fec042354f7
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a service manual, aligning with the PDF_SEO_DISPOSABLE_LINK_FARM heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://zajinet.ru/strik?utm_term=2007+harley+davidson+sportster+1200+service+manual+pdf PDF link annotation
    • http://muzoc.xyz/391687147156h5j4.pdfIn PDF document text
    • http://fumigatoff.online/42717023408ed1dr.pdfIn PDF document text
    • http://eroganoficial.site/xijivodenuzapigmb5sj.pdfIn PDF document text
    • http://pimesizawox.sportsontheweb.net/fawufozesibojazifiv.pdfIn PDF document text
    • https://cdn.sqhk.co/daladovum/hjjjem4/jungle_animal_hair_salon_2_games.pdfIn PDF document text
    • http://stankoff.org/how_to_learn_calligraphy_uk4g70d.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/branko_milanovic_capitalism_alone.pdfIn PDF document text
    • https://cdn.sqhk.co/tefupudoma/gvdieja/perfect_slices_mod_apk.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/how_to_arrange_pages_in_file_online.pdfIn PDF document text
    • http://muldwych.com/fifty_shades_of_grey_2018rwxry.pdfIn PDF document text
    • http://zuberisuxivaki.scienceontheweb.net/gidemupub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c5c7301-c6c1-4d7e-988d-09b1779a6c43/how_to_control_the_water_pollution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2928861f-5aaa-4c41-a3fa-5016ef6ce946/saxuwidaxudozibuvufa.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/82591722209.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60ef4e0f-b5fa-45da-b85c-c5a9bdcda00d/79972790537.pdfIn PDF document text
    • https://e49cd12a-7e53-4a25-9f98-ae37b5ff2e44.filesusr.com/ugd/35dc59_e804b726c34b49678588daff3d3773ae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/luxelula/47439701412.pdfIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_8ab56067c56f417dac2710ee9d03ef7f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/52791844956.pdfIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_b9336279bbf94877a43e46128a99428f.pdf?index=trueIn PDF document text
    • http://fidegaf.atwebpages.com/pimupalofomebokivoguzaw.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001285c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1285C 16540 bytes
SHA-256: 3e83ed34eed6e00b015c5f7122b22db12e0780c24717658958273b2a41147fb0
font_00_sfnt_off0000ee12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE12 5868 bytes
SHA-256: eadb09942c3a75e82458d993ecd34dca05c4110c3dba108a671d3f3eeef088d6
font_01_sfnt_off00010203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10203 11088 bytes
SHA-256: cd16c5d3e1899544190b74110c99665c6a66001c05fa9c631a6ed5a53b62d80e

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