Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbcd6d81357406b…

MALICIOUS

PDF

81.7 KB Created: 2021-09-24 06:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1fb86cf9660bcac5828687414f3bbeb8 SHA-1: c386d81cb244c6e3cc9d03d663138a3747d2ebef SHA-256: afbcd6d81357406b75e994062267d860e71906c019b8788aa160e92fa2905758
146 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 external URIs, many pointing to disposable hosting, suggesting it's designed to redirect users to malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports its role as a link farm for potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://irlanc.ru/uplcv?utm_term=android+emulator+for+windows+10+free+download PDF link annotation
    • http://sziszolg.hu/editor_up/jawewobuxegojer.pdfIn PDF document text
    • http://ladna.pl/user_images/file/72501659822.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/93794232749.pdfIn PDF document text
    • http://trongtinpc.com/luutru/files/nowerefogolamuguz.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b69290beb2---50379040094.pdfPDF link annotation
    • http://belgium-ex.com/images/blog/file/95005887406.pdfIn PDF document text
    • http://exdebt.bg/userfiles/file/kakajem.pdfIn PDF document text
    • https://ever.dacola.com/upload/files/95010370387.pdfIn PDF document text
    • http://ebbers-schilderwerken.nl/uploads/files/19476918407.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312a8aa4dfc---tapebajuzidipiwaw.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/38993928534.pdfIn PDF document text
    • http://dotykbylinky.sk/_subory/subory/mixonifebe.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210922182926270.pdfIn PDF document text
    • http://www.dogwoodagility.nl/ckfinder/userfiles/files/ziruwokajetodanozegur.pdfIn PDF document text
    • http://teenmag.cz/userfiles/file/jutonisosin.pdfIn PDF document text
    • http://icbiz.ru/userfiles/file/45159665239.pdfIn PDF document text
    • https://crmsaas.dswip.com/ci/userfiles/files/27261713084.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/83800228785.pdfIn PDF document text
    • https://gosselindesign.com/images/from_fckeditor/fichiers/poxixobupapuxawewexube.pdfIn PDF document text
    • https://www.karelo.com/uploads/File/81238631873.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/50072850266.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614273fb8a978---81021248390.pdfIn PDF document text
    • http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/piniguv.pdfIn PDF document text
    • https://myagenda.myagenda.cz/pictures/editor/files/70015304879.pdfIn PDF document text
    • https://sherwoodchamber.org/ckfinder/userfiles/files/64057255601.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_off0000dac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC4 17188 bytes
SHA-256: 68b5c2085aae2eb04c6956dce426bcde2a223caa03784170eb0dd2dd773f4005
font_01_sfnt_off0001075f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F76 10856 bytes
SHA-256: 236f101e7f3a67a12db65ed7ce8948c5e4c3bf59d0b0a4463a65e84127a31828