Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7980233064f8e48…

MALICIOUS

PDF

71.7 KB Created: 2021-09-29 12:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6d45a8d8b95438e7d2b751de3d46c21e SHA-1: fe3bfe28adb14d5696cf51a57afc2379453a51cc SHA-256: d7980233064f8e480b599b8d541d5a574020a17c8d488adeba866de8b19d2831
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, likely for phishing or SEO abuse. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://huntic.ru/uplcv?utm_term=pokemon+diamond+shiny+code PDF link annotation
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/6799e5798f438f669ba877276485ef1a/dotuwenatijijupoxemefopav.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/gubitowexevupajagofisedo.pdfIn PDF document text
    • https://www.pepinieres-gey.fr/ckfinder/userfiles/files/tagovovebogonudibokizemo.pdfIn PDF document text
    • http://metalzilemboeventi.com/userfiles/files/turasibowarewi.pdfIn PDF document text
    • http://mextro.de/upload/files/88667451598.pdfIn PDF document text
    • https://distriparkbotlek.nl/userfiles/files/lizujemimu.pdfIn PDF document text
    • http://abwrva.com/uploads/files/9508530836.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/161413dac27905---puwojedob.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/10855a27143aa022bc5365375eb9195a/16394377187.pdfIn PDF document text
    • https://kratky.eu/files/file/pisowasemada.pdfIn PDF document text
    • http://luckysim.com/userfiles/file/54132831445.pdfIn PDF document text
    • https://laser123.com/geektic/files/35764419404.pdfIn PDF document text
    • https://kaptenhoki.info/contents/files/xudibixedafexo.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210902025753.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/bevodaniget.pdfIn PDF document text
    • https://webmenuplus.com/images/file/vodix.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16143594a3bc92---pegepedegoxirojibisas.pdfIn PDF document text
    • https://polenhosting.com/calisma2/files/uploads/daxefukanamepubixazoruk.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/sinew.pdfIn PDF document text
    • http://bdpq.hungminhits.com/files/uploaded/files/tekefavuw.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/41829741940.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/41253374123.pdfIn PDF document text
    • http://foodchemsino.com/d/files/pasugidudov.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/85b5abffc67177814966733c1c47e0ee/pezar.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB46E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC85 10596 bytes
SHA-256: 16bd59ba4e0ae29978bb43bb85132547962d9c9ea42398a11813f15ba35d027f
font_02_sfnt_off0000e48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48F 17528 bytes
SHA-256: c6dd4837ea6e81a89b1fc8e7ec04cea5cae7d37c5c6c91ab779846122ebac0ec

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