Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97afacc25a86509…

MALICIOUS

PDF

77.3 KB Created: 2021-10-14 13:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ee49b3a76df34ecd4449bacb18cb2d10 SHA-1: e68ca5d58d336265f7451f23162c5647d1afdae3 SHA-256: d97afacc25a865090d48ac658789d42924c0aee467f140ea13e116b4af7ae32e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, some of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution attempt. The presence of a 'download button' lure further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://drafthe.ru/uplcv?utm_term=cs+lewis+the+four+loves+pdf+download PDF link annotation
    • https://koncnc.com/genelresimler/file/gesagejatorazejesojuxelo.pdfIn PDF document text
    • http://www.neoneophytou.com/ckfinder/userfiles/files/47814512124.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/gikolidoza.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/bosinusigaras.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/161612fb6df78f---bikanasizidopolugu.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615b342e70b8e---dezukotivoj.pdfIn PDF document text
    • http://electronicaindex.nl/images/uploads/rowagafedo.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/170fcfef1012738fab4c69cb410c4a41/73578038685.pdfIn PDF document text
    • https://xpress2.eu/ckfinder/userfiles/files/tiwoxexunowofakoz.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16160e816811b0---7978697965.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/bizikevopus.pdfIn PDF document text
    • http://profiklub.sanswiss.cz/files/file/wigixol.pdfIn PDF document text
    • http://studioghittigargnano.com/userfiles/files/norutawivipoxigimozox.pdfIn PDF document text
    • http://technestudio.eu/userfiles/files/simapapifowumidogesisamu.pdfIn PDF document text
    • https://gym-rectif.fr/ckfinder/userfiles/files/gakijinepatibivaribuvig.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/jaderaxisigixuve.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16153ad2dc218d---wuregubitepopagasurume.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/zifisi.pdfIn PDF document text
    • http://halanmilk.com/upload/files/88392930592.pdfIn PDF document text
    • http://oris-am.com/editor_up/lipen.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16162f69910310---radopilemevaguvabenu.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/fokovub.pdfIn PDF document text
    • https://bgg.pirkitpadangas.lt/ckfinder/userfiles/files/49247312260.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161677dd88e2a5---81925461451.pdfIn PDF document text
    • http://cluster006.ovh.net/~greeters/be/ckfinder/userfiles/files/xewaduwevuxilurun.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_off0000c46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC46A 18964 bytes
SHA-256: 42fc7472175ca773baf07c9f051abf32cf9b249a9629e7e7493fed126cd1563d
font_01_sfnt_off0000f601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF601 10876 bytes
SHA-256: eb96f3fb033ac672fa6e54d5ed2697b471eb5ed8dba542b2b4fed400126f73e6
font_02_sfnt_off00010f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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