Malicious PDF — malware analysis report

Static analysis result for SHA-256 562f4637c4373992…

MALICIOUS

PDF

88.2 KB Created: 2021-08-10 08:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c09a164732ace2c47fa1b48f217033ce SHA-1: e7b274808122fa6bae521a4bd2a3d4fb515beb49 SHA-256: 562f4637c4373992f2fb28bf4a274371e37d50bde85725571cf6d2857ace3b81
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as a link farm and a potential phishing or malware distribution vector. It contains numerous embedded URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://queure.ru/uplcv?utm_term=tic+tac+toe+glow+mod+apk+download PDF link annotation
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160affba2cf3e5---noxumewazisenugemebu.pdfIn PDF document text
    • https://gsacademy.ge/uploads/files/jolovotisanidi.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/a05b8678d59647ad2dce4dbcc3ccf95e/3675454973.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/88521213578.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/ec29d36212ccb8a1ffee6ed47f681d0d/82691399204.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210727094741.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/92997315678.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/o40ln2hfdfu3g80065ivg4k0m2/77136099049.pdfIn PDF document text
    • http://npas.ru/pic/file/32546360670.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/1918959789.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/37989i6ds34ihcatmahbpi3l1j/gegoj.pdfIn PDF document text
    • https://steammining.com/userfiles/file/29543108495.pdfIn PDF document text
    • http://deaprogettazioni.it/userfiles/files/xoxagokovawenukavekafa.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/7qjhrv1ttchigr2ai1lu7g5eh1/70051649039.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/074d5fe3bfjmbbvmtct9naqq63/rokufodatutaliku.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/99689386671.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/86141983199.pdfIn PDF document text
    • http://broeinest.org/ckfinder/userfiles/files/lelexer.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093cd4e3d449---64709000557.pdfIn PDF document text
    • http://njnccualumni.com/clients/0/05/05b55d2c4c342460da0dc2f503861b12/File/98881786187.pdfIn PDF document text
    • http://southfieldhigh1973.com/clients/2/27/27a5067865c8334ad4a5a1fd7642c928/File/tuvijokowijuxonavaxokoxe.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/mivuribu.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/47392262696.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/goxiruw.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD181 10728 bytes
SHA-256: 36fe336c6e6cb074a7a1f4e524d1289277a8ecb8d82464c520e1e486c5ff2425
font_01_sfnt_off0000ea00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10212 22628 bytes
SHA-256: 952f08529cb3ad36fc2c92860dc7521cdb49bf372d8c1dc60630d715b0852c6d
font_03_sfnt_off00013a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A2E 16576 bytes
SHA-256: 7f59482f532a9b596894b03bafabc7634a6901b1be5c5cd8eef301290c807542

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