Malicious PDF — malware analysis report

Static analysis result for SHA-256 02fb36db15cac243…

MALICIOUS

PDF

73.4 KB Created: 2021-09-12 06:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: dd561c6ac42e62beb88e3a17d7511397 SHA-1: c2784d553b3ed4c42da80189e1047f8115355d1a SHA-256: 02fb36db15cac2436e9ba77e79ad930cd991413fcabc10af035f45af54ee70e8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It functions as a link farm, embedding numerous URLs that likely lead to malicious content or further infection vectors. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics suggests an attempt to obscure the true malicious destination through a large number of redirecting links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://mixmarketing.vn/upload/fck/file/vufedafe.pdf In PDF document text
    • http://cochemical.com/upload/files/60517533351.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/933067f66d31f11eed66b435d50f564c/nataxanudofe.pdfIn PDF document text
    • http://oticonshop.com/ckfinder/userfiles/files/bepumesapefat.pdfIn PDF document text
    • http://babyshelter.net/assets/upload/files/73984818699.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/kibisas.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/77039960965.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/94907654625.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/192b3a4925cac06f3e10d44285236295/64045216692.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/49913402623.pdfIn PDF document text
    • https://4of100churchstreet.com/assets/media/files/42716513642.pdfIn PDF document text
    • https://memo-log.com/userfiles/file/25088796533.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/tapuporada.pdfIn PDF document text
    • http://nuocmambason.com/upload/fckimagesfile/a98e9ff07f47ca33c7d150a3cedb7187.pdfIn PDF document text
    • https://fond.ru/userfiles/file/49132000880.pdfIn PDF document text
    • https://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/70828687064.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/pegudukuwivizutus.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/fasinugibozurupagaxepawad.pdfIn PDF document text
    • http://studio5r.com/userfiles/files/80635611010.pdfIn PDF document text
    • https://junona.manyel.website/images/uploads/medium/35113656193.pdfIn PDF document text
    • http://rent2day.ca/ci2/userfiles/files/82979402445.pdfIn PDF document text
    • https://togeltop.net/contents/files/wodipusuxarite.pdfIn PDF document text
    • http://bsp-plovdiv.org/ckfinder/userfiles/files/bikegowokafiko.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/57365033199.pdfIn PDF document text
    • https://falconshipping-uae.com/userfiles/files/wewenedavezenodutesuzun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=love+island+uk+season+7+episode+1+watch+onlinePDF 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_off0000bca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA3 10912 bytes
SHA-256: d7691c5201f55f0625ff417d8e0c1e31cd788952900649c8d2998c8e23df7dd2
font_01_sfnt_off0000d5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0F 16256 bytes
SHA-256: 21c74bd0cc1d6b5d558a8f9e4f573021eb7c5a2579aab691483680d888585977