Malicious PDF — malware analysis report

Static analysis result for SHA-256 a89b271e0daeff01…

MALICIOUS

PDF

84.5 KB Created: 2021-08-23 18:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7dca10081f8d1fccec24d700278953e1 SHA-1: 9810e2de029a4052f002045f94b5359195ef9f6b SHA-256: a89b271e0daeff019baacc39f4a00c425b9cdbf828f02e2e8e9a341dd2b2a57d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the document's structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://garglob.ru/uplcv?utm_term=gta+vice+city+cheater+apk+for+android PDF link annotation
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/hho62ep8rmofhohtnn3fjn84o6/11234527258.pdfIn PDF document text
    • http://erodiertechnik-wenzel.de/userfiles/file/34332764278.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/8beed1281fd650ffd654a5c7f274fb16/wofivumugajiv.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/858354bb9e553844734968c9832dcd1a/95784578872.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b13993649fb---30104413199.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/536f217647633e124b5fbdab801a100b/666111681.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/limokejuwilikaxi.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/69960666369.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/kezukurifafukojadewime.pdfIn PDF document text
    • http://globomax.eu/userfiles/file/kanegiwu.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/xitogenabise.pdfIn PDF document text
    • http://tumakuruvoice.com/tumkurvoice/ckeditor/ckfinder/userfiles/files/79697589832.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/70194448317.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160c397c60649c---kejir.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/meridasufufar.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/21644122198.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/92944049101.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/482bc536c102e4cfb30d5b071ace4e64/13243546965.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7cf732516---rakomoxegazijiwedopazo.pdfIn PDF document text
    • https://rm-parketi.si/uploads/60054700256.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/41328559468.pdfIn PDF document text
    • http://turatabor.hu/media/jogonoxamuximokusilid.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/ivttdoi2hi3dh1kg3q3mdhns60/viduzovedetugizunaketi.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/sixigojuxuvuvevakukoja.pdfIn PDF document text
    • http://zonweringbelgie.be/ckfinder/userfiles/files/23256304729.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_off0000e2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D4 17688 bytes
SHA-256: 442d2151d922ea0922bd4a8d5f21f48b691d1d3c6819c7217704af645ca37d4d
font_01_sfnt_off0001112e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112E 10816 bytes
SHA-256: d77ad2b214f975199b30e0aab39d8d142970b770a2b135f33ee62e01dcd7a302
font_02_sfnt_off00012a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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