Malicious PDF — malware analysis report

Static analysis result for SHA-256 366a2d09c8bdbaaf…

MALICIOUS

PDF

67.9 KB Created: 2021-09-04 04:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7458609d3294307656a7886c65a748d0 SHA-1: 70042fefd1df21fb1ff3c6d6160e5e6e11f5b58a SHA-256: 366a2d09c8bdbaafa81e9f3eef2836d02002f99bb5f240701dc45faf7d7101b5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous embedded links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm for malicious purposes. ClamAV detected it as Pdf.Phishing.Trojan, and ML classifiers also flagged it. The embedded links are the primary indicators of malicious intent, likely serving as a lure for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5690

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://smidgel.ru/uplcv?utm_term=pdf+to+image+converter+gratuit+telecharger PDF link annotation
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785e03d2bd7---59769194690.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc05117a42c---94430288364.pdfIn PDF document text
    • http://mvsexpo.ru/admin/ckfinder/userfiles/files/72249706072.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/h8s43o27095ib8tbmrirq1r0h7/safitivusenosop.pdfIn PDF document text
    • http://spbmedax.ru/sites/default/files/uploads/zepemit.pdfIn PDF document text
    • http://valeneighbors.com/userimages/40919225788.pdfIn PDF document text
    • https://totalmediasolutions.ae/ckfinder/userfiles/files/balulosonajivagupimu.pdfIn PDF document text
    • https://truckforceone.com/upload/editor/file/notimuvomib.pdfIn PDF document text
    • https://www.studiorosaliabusco.it/ckfinder/userfiles/files/manimakidazalipoduw.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/bc0add88f3e70b15b259a4e336cf3787/sujeguwuf.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/5lecat0pj6qf8d7ese5qejsta7/tazub.pdfIn PDF document text
    • https://zagorjeadventureteam.hr/files/90722576437.pdfIn PDF document text
    • http://classtool.info/upload/files/54371541845.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/qssem54s5nid1bqno93c0roql6/73474351585.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607d06b4e8351---pemubedofo.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081156315fe9---10636760911.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160705abd43d57---83102842725.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/2c48ba8d45f385827e7f46a4462c3d24/87040450950.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/bb03605bc1a44205969c195f8b0d464a/girevozezasazubimupu.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb6a402857---75898023392.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160820ac63b250---28871756387.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bb861f35996---lenizubijulikeratoze.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/xazewarowod.pdfIn PDF document text
    • http://delve-cr.com/uploads/68048700388.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/0d7f40df20ccdce0924248bd49b36a2c/44194239011.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41C 16548 bytes
SHA-256: e45a970f0d5a9039f78ed4c97b2ed206f8fd45941430053842a31efac56d564a

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