Malicious PDF — malware analysis report

Static analysis result for SHA-256 29473a630c218f24…

MALICIOUS

PDF

93.9 KB Created: 2021-07-31 11:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 266ed702dbe6eff81eec18405fe5df97 SHA-1: 6f40900b14043641a17304df807839c742aec47c SHA-256: 29473a630c218f2404f17d99fdce54370bdd3346b4c75ba435390b5e91e8ea33
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document attempts to trick the user into installing a browser extension or update. The embedded URLs and link farm heuristics suggest a phishing or malware distribution scheme, likely involving redirection to malicious sites to host or deliver the payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://nomylo.ru/uplcv?utm_term=mission+impossible+4+full+movie+in+hindi+download+480p+filmywap PDF link annotation
    • http://clasesholandes.com/userfiles/file/fimonepatupegojifaxoruz.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/nidolixigodizuwatudezu.pdfIn PDF document text
    • http://straps.by/ckfinder/userfiles/files/temesowikagujezivo.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/jezejorewatekafuravo.pdfIn PDF document text
    • https://cecprint.com/images/file/53718354727.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ddde037925fbc4d27bfad7026c1ceb63/pelarokapo.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/91778998650.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102eca7d2960---dugigiropivu.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16104237665166---jisufasig.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/2787479ab5b2a98d8b7b491b88808a20/44496295873.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160cae20a20c6d---37207507299.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/551ace05ae6dded63cad862cd5f0b316/nekozejodejanuwupemiki.pdfIn PDF document text
    • http://nissanotogovap.vn/uploads/images/files/bugaditekiwokezedokel.pdfIn PDF document text
    • http://webhenevents.com/clients/868374/File/78544691158.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/1a8ce012aa259c230930e89db80db6f1/9162005160.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c084249b6---seniwitolokufurev.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160751aae9d376---19840768228.pdfIn PDF document text
    • https://abeess.com/userfiles/file/bugesuzamopata.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/josanopilogaxusotemelule.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/50878265039.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/b545dcad2242b0ac03ae3536c3155502/10778492003.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/314f3845555de5d9afefc2bdc606ed38/derudatawa.pdfIn PDF document text
    • https://webornate.com/viking1/uploads/files/99888442687.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_off0000ecf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10503 16084 bytes
SHA-256: c27fafdda185be2695e99106f22849c7304d1d4eff2202c3575f3979fbde09eb
font_02_sfnt_off00011a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A39 11472 bytes
SHA-256: 30bd7ecfe321f025ed9d99cfcca9a4d910e43bf0ffd0f65867e09fa51ed980b6
font_03_sfnt_off00013503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13503 19328 bytes
SHA-256: 7487e79c5a4d58b8549a16caf255cd8a02a93dddb979e44bd4482721082c759b

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