Malicious PDF — malware analysis report

Static analysis result for SHA-256 22db66b1ca527726…

MALICIOUS

PDF

116.8 KB Created: 2021-06-26 03:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fee74f2ce26817071906a12394216e51 SHA-1: 7695d9f51c6509012e8b4a97419d8846e24657cc SHA-256: 22db66b1ca5277268e1a3ab853241da6b08d239fae83aa98e90bc84b546dda55
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external files, many hosted on compromised websites or disposable domains, indicative of a link farm used for phishing or malware distribution. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic strongly suggests the document's content is designed to trick users into paying fees for non-existent prizes or parcels. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://hpsoft.shop/upload/files/papugufivapago.pdf
    • http://adamslakeband.org/userfiles/file/40736925498.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160765f1de053b---zusave.pdf
    • http://ottotech.center/userfiles/file/84657399775.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086ccaa140ce---zozibana.pdf
    • https://rockdental.co.uk/wp-content/plugins/super-forms/uploads/php/files/4e4edf65ccf3df5f9a5561fb011763c1/woxupebuv.pdf
    • http://erictex.com/ufiles/files/kubojufuw.pdf
    • http://uniroll.pl/user_images/file/wisesuv.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/c4f7c92d08b8def49730cfb714d19183/sijan.pdf
    • https://batikatravels.com/userfiles/file/makefixupokulaxu.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f20fdce95e---sijilenekodazememibumew.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608dacc8c02a6---4356128709.pdf
    • https://aartipalette.com/userfiles/file/99335357084.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079052e2e967---fikajugazojivunari.pdf
    • http://meyergarden.com/ckfinder/userfiles/files/73639115595.pdf
    • http://kinel-hunter.ru/upfiles/file/jikumojulesojunata.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/c7f7b6278d16ef62089b817783ca6797/vemasutuwefinogor.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0ebb5619a---kezatove.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160832ace9851f---73001953038.pdf
    • http://brlairport.com/images/file/subusorutovikexob.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e6073d829---19491464256.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/79a254d0642640b6762180cf9241068e/neriramozosupizamukugabab.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/cjrvrhc6i59fk2lpcvpfk43uli/lakajizoboripijugebul.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=dragon+ball+the+beginning+full+episodes
    • 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_off000168b1.bin
a5631e0c7446fb6ab16bec0cfa20f361a6112320b5ac1f984cf96efb3c7aa228
pdf-font-stream PDF embedded font (sfnt) at offset 0x168B1 16836 bytes
font_01_sfnt_off0001947b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1947B 16792 bytes
font_02_sfnt_off0001ac92.bin
d3fa9caf56fdb0aa7565f97fc4028a9aebe8729e0e8691aabfa764438eb42f29
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC92 11016 bytes