Malicious PDF — malware analysis report

Static analysis result for SHA-256 901fb3084c6990e7…

MALICIOUS

PDF

71.5 KB Created: 2021-09-29 13:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ac763f68be71bb834311e30928e0bf4f SHA-1: 830834729a1c1b2178af914280cd47d29baf1cf8 SHA-256: 901fb3084c6990e734f826dc0f6a2f951ce45ac1f0066e4a4d40357270c2212b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm for SEO poisoning or phishing. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. The primary lure appears to be a fake download link for 'gta iv download for android apk obb', indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://huntic.ru/uplcv?utm_term=gta+iv+download+for+android+apk+obb PDF link annotation
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/161333a4db1dbb---museterotazimopasuru.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/94f280045c4be86d11919f7fb6cfdca0/42464454815.pdfIn PDF document text
    • http://le383.com/uploads/files/89004682376.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/161519320d6a5d---nafelarapiki.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f31a638968---rirovilanivomotugaritigu.pdfIn PDF document text
    • http://hotechike.com/files/files/23471965226.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/deduli.pdfIn PDF document text
    • http://valencia.thepokeluau.com/uploads/files/60071400741.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615412f3150ef---giguzolixufux.pdfIn PDF document text
    • http://bodamvientin.com/uploads/userfiles/file/desaxivafamozevo.pdfIn PDF document text
    • https://hometutorsdelhi.com/userfiles/files/lapazinugudaxasegej.pdfIn PDF document text
    • http://xnucleus.com/members/member_images/files/6762692689.pdfIn PDF document text
    • http://honda-vo.com/upload/file/xafijukososorowonew.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/pudoveb.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/wamudosigekamomi.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/domibojafokijotazunaxe.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210921054357.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/jivadefulavefewufedikafe.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/87089df76b0e8510463e1f36095a7dfc/pufolumitofuwelexod.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/xarevaridatujirasan.pdfIn PDF document text
    • http://mskabel.cz/UserFiles/File/jogebuzeparomedudepaja.pdfIn PDF document text
    • http://re-media.ru/foto/ck/files/piminuruna.pdfIn PDF document text
    • https://houstoncoinclub.org/FCKeditor/file/35121242735.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/tidonoma.pdfIn PDF document text
    • http://style4.allwebeasy.com/userfiles/files/18362804233.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_off0000b3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBEA 10612 bytes
SHA-256: 8f7fd31f39b65098fd7a9b467580c3dcfc9bf167c4ee535ae9400f697472d33c
font_02_sfnt_off0000e416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE416 17260 bytes
SHA-256: 8c779aed9de7f0ad2a8bd4c63aeebb731ba19e1e3ad40fa07dbf9ddeb8fa0dba

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