Malicious PDF — malware analysis report

Static analysis result for SHA-256 a53b9d057f3bd494…

MALICIOUS

PDF

85.5 KB Created: 2021-06-26 21:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 15bf08ded81401b591b481e0db3e8c29 SHA-1: ff9456c06301605dbae0990d4bd239f86dbd9954 SHA-256: a53b9d057f3bd494c34184a3380b10e2462d7a9327b52fadb8a9bd674685d968
216 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links to disposable hosting and compromised CMS upload directories, likely serving as a link farm to facilitate phishing or malware distribution. The document's structure and content strongly suggest a lure for financial fraud, potentially involving fake prizes or delivery fees.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/9dfe78bc0b85035e7f24cb76d9aa0ab2/pugovabudeme.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/11cd7da3a922b4b2174dd17a12e5a9cd/zoginenetivewajufagu.pdf
    • https://khanikango.in/file/95648934656.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/c1a3fb63d45034fa41c5d8c68bbad87a/78581269584.pdf
    • https://lee-trading.tw/archive/upload/files/51108424035.pdf
    • https://zionapostolicministries.org/uploads/file/powojufajof.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95c63e5d78---lojejej.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16079acc112ae2---85054805015.pdf
    • https://afra24.com/basefile/afra24/files/jidubab.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16097e4e87c0bc---1914871293.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d46e73e2ff---51777173026.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/11764a77ad4d175758ae396b3c1f8dc3/wifiwag.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/ds8bsh2tdjte63lbenkq041guq/rarasalowokonilisasapow.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f163c48e9---37001698111.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f470f706d0---92713969086.pdf
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/29971152524cb1239473db4392dfd9cb/jibuwadosilinugawip.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/1cd1a35fd2e6e211d892521adbd54313/21646920674.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/9f612fe7fbcd0e33886d964c1eca7f3d/33459342828.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbd419e50f---24478760918.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/97826a32c6b98802dcbab50561ab4bdf/27695758002.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd4e46090f---21979073269.pdf
    • https://narimasu-chintai.net/jcfiles/file/pefiwajukavojixegujukolep.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=how+to+curve+font+in+photoshop
    • 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_off0000ec0f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0F 16792 bytes
font_01_sfnt_off00010421.bin
d66bade4b0e83dda4a6cc43476e5d327f13751cc06868fdbbbc4036d023b2c21
pdf-font-stream PDF embedded font (sfnt) at offset 0x10421 17160 bytes
font_02_sfnt_off000130b7.bin
2de2484be218ec2038f96a1731a5d875b4d86abf7abe7ee63500f97dc9d7b9da
pdf-font-stream PDF embedded font (sfnt) at offset 0x130B7 10612 bytes