Malicious PDF — malware analysis report

Static analysis result for SHA-256 d029b9bd4d2d21c2…

MALICIOUS

PDF

75.0 KB Created: 2021-09-19 05:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ceddb1fc75881ee84e9a7f8a6c4b9631 SHA-1: 6a8032b7349249d581e0787cebd982db7e1fb63c SHA-256: d029b9bd4d2d21c24a6542711631594cce44ef935eb78af87e8a053bfdc958cf
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a large number of external URIs and link farm heuristics, indicating it is designed to redirect users to potentially harmful websites. The URLs extracted suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://crewmak.ru/uplcv?utm_term=golf+ireland+app+android
    • http://avvocatogiuliani.it/userfiles/files/63567348360.pdf
    • https://postele-z-masivu.sk/ckfinder/userfiles/files/xorama.pdf
    • https://poulinstrapscan.com/userfiles/file/folovaxulebixepomeriten.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/f0c26bdc27a2d365819c8f589766f0d2/befefep.pdf
    • http://vasekurzy.cz/userfiles/file/wimazovadigagidawebowuxi.pdf
    • https://photopoligrafic.ru/ckfinder/userfiles/files/14903186690.pdf
    • https://biocoils.com/img/file/dorifelilupomezoxepozuj.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613de8a0c9601---38670872157.pdf
    • http://ksnjl.com/userfiles/files/sulurepiwesokinem.pdf
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/zutuworudodagavogogag.pdf
    • http://web-news.eu/www/pkpar/userfiles/file/54007770796.pdf
    • http://suamanhinhlcd.net/userfiles/file/biketajib.pdf
    • http://fishngrill.iorderfoods.com/uploads/files/kerefosoxategafimajame.pdf
    • https://cicasoftavukatwebsitesi.demowebsiteleri.com/upload/files/setelemol.pdf
    • http://taociren.com/upload/file/210918041611138377ptctubw0xjen.pdf
    • https://binarbaidtrading.com/public_html/userfiles/file/natoma.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/161307703a1bd7---7864576576.pdf
    • http://gyarmatilovastorna.hu/userfiles/file/jepimozabuveziwunese.pdf
    • https://jv-cms.crazy-jessie.nl/uploads/files/mimubiwidofu.pdf
    • https://holocaustresearch.pl/nowy/photo/file/logefoluwowaga.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a81815300---peguno.pdf
    • http://kingsbrite.com/kingsbrite.com/userfiles/file/wanalilomeku.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea05ce51b7---52611533016.pdf
    • http://preprod.app-nomads.com/ugecam/admin/ckfinder/userfiles/files/zejuzamaxux.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c38e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC38E 16792 bytes
font_01_sfnt_off0000dba5.bin
3614c7f5a7bf422d915e1a909986759a9516dbdc71ed3eac63490779c7e9ffb6
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA5 10264 bytes
font_02_sfnt_off0000f2be.bin
725f59c324ee9d923114d5813cd59d9b4a9415392587022e3491b022867c22ed
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BE 17004 bytes