Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c08f2c38cf0d600…

MALICIOUS

PDF

80.9 KB Created: 2021-09-19 12:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 63ebac1775f8259ca4d422505733adca SHA-1: c33088668515c347a97a273c76b10c1b35c5fe37 SHA-256: 0c08f2c38cf0d6009303cfba2445850e3904eb45f4cd691e63e763aeefed8411
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged as a link farm, indicating a likely phishing or malware distribution attempt. ClamAV detection and ML classification strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.bmo-agencement.fr/ckfinder/userfiles/files/76716705962.pdf In PDF document text
    • http://mebelhotel.ru/images/news/file/vemixo.pdfIn PDF document text
    • http://marvdashtonline.ir/userfiles2/file/papuwaxivuzawunosunezef.pdfIn PDF document text
    • http://www.ciesol.com/ckfinder/userfiles/files/44087621883.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210910053307.pdfIn PDF document text
    • http://vsrru.ru/userfiles/file/9543586649.pdfIn PDF document text
    • https://www.vpn-solutions.com.pe/ckfinder/userfiles/files/88504405568.pdfIn PDF document text
    • http://tipiland.net/upload/file/7823449635.pdfIn PDF document text
    • http://heathrowairporttaxi.website/userfiles/file/58381230008.pdfIn PDF document text
    • http://ensky-chemical.com/upload/files/fural.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d88a9593b0---92368748084.pdfIn PDF document text
    • http://shopabrang.com/images/files/46759418334.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/mim04g83ca4thhp720s8878lao/neduzop.pdfIn PDF document text
    • http://newmob.it/userfiles/files/89138783119.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/tudopebosuboba.pdfIn PDF document text
    • https://tenshinorchids.com/FCKeditor_upload/file/sudawuw.pdfIn PDF document text
    • http://teraval.cz/res/file/12443761711.pdfIn PDF document text
    • http://siciny.pl/userfiles/file/dijomarokijululanixanati.pdfIn PDF document text
    • http://monthclean.com/uploads/files/202109160605124235.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/xebarukojifodapolutug.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210916031214.pdfIn PDF document text
    • http://lechioutdoor.com/userfiles/file/87949869524.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/89564562218.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=hardest+thing+to+make+in+minecraftPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF001 17192 bytes
SHA-256: eefa2930abc9b1b8cd89a41b4b0ed9f09f399f70f05da93396ca4648dd421911
font_02_sfnt_off00011c8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8F 10960 bytes
SHA-256: e0ba64198c2279bdb92452453b741c894d074ec56fff98d7d338109e0de739b9

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