Malicious PDF — malware analysis report

Static analysis result for SHA-256 80059f3f34606f3a…

MALICIOUS

PDF

90.9 KB Created: 2021-09-07 11:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 615be6c00eb550ded81d7bb63f013464 SHA-1: 2a9679f37f73ed2ffded2cc66a028994ae6edd51 SHA-256: 80059f3f34606f3aea775d97284cc182947f900fbb37ec5fb1a15dc3115e0db2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting sites, which is a common tactic for phishing or malware distribution. The presence of numerous unknown URLs suggests these are the primary mechanism for delivering the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://transport-vehicules.fr/userfiles/file/50175384566.pdf In PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110fe5cceeda---tusag.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/gavuxomekugakegel.pdfIn PDF document text
    • http://ruresept.ru/files/file/2689332525.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160d6ce596855e---jijomafezunax.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/25701828518.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/46345898619.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/likedojorevelirirob.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/1243517233.pdfIn PDF document text
    • http://xn--b1agaa2anfqdp.xn--p1ai/ckfinder/userfiles/files/96894654668.pdfIn PDF document text
    • https://vmgeducationtrust.org/home/vmgedu/public_html/public/userfiles/file/67044807520.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/1572732521.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/c6qia78mfgjkto357373bjgang/nevunumobuvabinuvofex.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/lokubovugebusadota.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38df8bd4c7---71268053434.pdfIn PDF document text
    • http://billsky.ee/files/file/40910746619.pdfIn PDF document text
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/4b520c7430be73183086527e93004945/46369636840.pdfIn PDF document text
    • http://jl-vacuum.com/upload/files/97709596815.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/dumulu.pdfIn PDF document text
    • http://ecosdaliberdade.com/ckfinder/userfiles/files/devipitetip.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607b53a3b5f3a---19103521134.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/dixenivevapimoguru.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/4e3fkss5a75uf2je7ucojnsi3f/92770890100.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=greedy+algorithm+in+data+structure+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_off0000f574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF574 11320 bytes
SHA-256: fb430ccead7a1d65389fa25ddf57e0f874a408245a0211f0dcd14b1ef70ee696
font_01_sfnt_off00010fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127CF 20728 bytes
SHA-256: b7dc8dbcd01f398a2cfe2a642f67695b9f80c834619f583cde923727b06a3fbc

Open this report in the interactive analyzer, or submit your own file for analysis.