Malicious PDF — malware analysis report

Static analysis result for SHA-256 585d60b2eee2ad49…

MALICIOUS

PDF

99.1 KB Created: 2021-06-19 18:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ba02bd68c9382044dd6aa99aa3b59dd6 SHA-1: 585758da2b759ba9603e48dfe2854864118bdc40 SHA-256: 585d60b2eee2ad49ab1293e86c002eac92b72dba2ec44c492cba22808a758e2c
164 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating it is part of a link farm designed for SEO poisoning, specifically targeting search terms related to downloading Minecraft PE. The presence of a 'download button' lure and numerous external URIs pointing to compromised WordPress upload storage further supports a malicious intent to trick users into downloading a payload. The ML classifier and ClamAV detection strongly indicate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=download+ray+tracing+minecraft+pe PDF link annotation
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084ca43a1a5e---61389293816.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16094b176df8c1---44862634351.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5bab98b2e---negabisid.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099ca77dd298---tometubomazudavufuw.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b408040193d---37549254993.pdfIn PDF document text
    • http://henca.com/files/details/file/karanazisapeso.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/kazusumove.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7042f11534---85822073752.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0cdcc2f215---92615240650.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/25331317753.pdfIn PDF document text
    • http://www.asslar.de/downloads/42568084272.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/fajen.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/nepudufamevuw.pdfIn PDF document text
    • http://duepassidalcentro.it/userfiles/files/10434680037.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/2da6d0f9fe08ff103d81c180932b75d3/vivurejowisutonixidode.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4768da74b4---wasoputure.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160792d687c385---56477601651.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/zatijoganetomek.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/39421853414.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA9 5276 bytes
SHA-256: 58505fb65d567630cfdb67bb13952b6746e226485e6bbee52c89cb22f8dd37e8
font_01_sfnt_off00013ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA2 19148 bytes
SHA-256: dc5f8c8c6f08dc89355b93941f1a91d5966ec7ce3eec696cc449b95fad3ab9c7
font_02_sfnt_off00016f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F3A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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