Malicious PDF — malware analysis report

Static analysis result for SHA-256 742f808262c1cbd0…

MALICIOUS

PDF

62.2 KB Created: 2021-09-27 17:29:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5d92f64dd0d459459a9f6a6609784ad7 SHA-1: ce0e15311c8528e045cb81382e72a28caa365389 SHA-256: 742f808262c1cbd0be1b848d8b6a4b32a19a999db2f4f7a7f00a81c8ef506198
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains. The ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly suggests a phishing or trojanized document. The presence of embedded URLs and the heuristic 'PDF_RANDOM_URL_LINK' indicate an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4719

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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=gamegem+android+alternative
    • http://sintellect.ru/Repository/file/zenafipatuvapujiloxapapaj.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/2jlot11584gr7g6s0um2u6gplp/3609462618.pdf
    • https://yasacompany.com/upload/files/50585564731.pdf
    • http://ats-dz.com/userfiles/file/38282962859.pdf
    • http://printrun.nl/userfiles/files/42395941376.pdf
    • https://pcparts.fr/ckfinder/userfiles/files/50004761826.pdf
    • http://ambulatorioveterinariobubiniregini.eu/userfiles/files/limebo.pdf
    • http://photo-preiss.com/upload_files/files/71906301107.pdf
    • https://glaze-metalart.com/upload/files/bazizojakimorukaworiku.pdf
    • http://tinavaron.com/ckfinder/userfiles/files/71379222224.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/0ec61a920cc3a3fae8fc320ca3a4addc/56671731094.pdf
    • http://cuacongtudongbinhduong.com/upload/files/59968250379.pdf
    • http://bannhuaduong.net/upload/files/23571698000.pdf
    • http://muabannhagiare.net/images/uploads/files/goxibuxineki.pdf
    • http://gabortech.com/admin/file/paxemasuboporup.pdf
    • http://imi.vc/upload/files/fuwatulojorifavubazusised.pdf
    • http://shiokuda1.com/contents/files/28428424702.pdf
    • http://asja.ua/userfiles/file/tusinupimuzaxuguzufejoz.pdf
    • http://storemisr.com/uploads/files/43453966248.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16151348f4090a---86394843876.pdf
    • https://byocamacho.com/ckfinder/userfiles/files/tarinilezafaguwoparibalu.pdf
    • https://china-glass-mosaic.com/userfiles/files/20210906_095429.pdf
    • http://shacklefordlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gejukozafiwazagi.pdf
    • https://usgcambodia.com/userfiles/file/xafepuxola.pdf
    • http://meuble-tunisie.com/userfiles/file/96442729643.pdf
    • https://fishuntpesca.it/file/23354948776.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2a8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2A8 16792 bytes
font_01_sfnt_off0000cabf.bin
57dc7b35c31530bb9eccfef47a15141b1274e8402744cf465737b855dc89a649		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCABF 10528 bytes

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