Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2ef64d14fe57bc…

MALICIOUS

PDF

80.8 KB Created: 2021-09-03 02:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d704f2b3186832129e50ec7f9c8738ea SHA-1: 8d368e21d11406252e81aa6cc00e2c3a9909dce7 SHA-256: 0c2ef64d14fe57bcfd2bd78ad1845438a87debe9dd486a4b2aad55930f19c3ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to redirect users. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://cadeco.com/testingsites/advantage_aviation/assets/media/file/51335301570.pdf In PDF document text
    • http://fujavietnam.com/images/Download/mutukizobegepuvadomeper.pdfIn PDF document text
    • http://iziusb.com/userfiles//file/sokobokipodunas.pdfIn PDF document text
    • http://dorapeyzaj.com/userfiles/file/17451261209.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/99bf39ca614a94feb88c49f5a1175626/sotanus.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/20218272233292899.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/d65d9a0e2dc74aa2faa5f7128728d272/88704724018.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/74206302152.pdfIn PDF document text
    • https://aordonez.com/images/contenidos/files/55853082814.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160886df076540---pejezerobekanavajenisofu.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/e3ff93770243c9ca45fa303601028672/setikofavaginotoladuj.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/49120674428.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/74348889706.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812df818800---88186939155.pdfIn PDF document text
    • https://cristalensi.com/public/File/kirikapadavelezafuwefereg.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160796a1522641---97417607136.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ff874c1e633---76570859905.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/4a3a409db278bde53b6a3d791b706b80/47746398153.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/bubefuvojusuwevawosego.pdfIn PDF document text
    • https://apizf.org/public/file/94942331275.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/3559f9621835c2b8853b14d6b84dc9c4/xawiwozoxawutefi.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/vajojarenipiwovu.pdfIn PDF document text
    • http://studiotecnicodama.it/userfiles/files/37323283083.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160afb530af209---basefev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=bugle+calls+sheet+music+pdfPDF 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_off0000d48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48D 19312 bytes
SHA-256: 4995ac4c8fc7b8ab1765075a309136ec6af07b77ad58bb304449dba118c8c00f
font_01_sfnt_off00010481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10481 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C98 10896 bytes
SHA-256: a63a990151f032c05e54c045de07a0484ed1983967c69d0dff6825c9ab7b044b

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