Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2cd213b08e16b5…

MALICIOUS

PDF

92.4 KB Created: 2021-06-29 15:38:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c99b97194c4e171fcb6639417bac2659 SHA-1: 5933350a1cac8475ca5f1f6dc2959b5bca68b180 SHA-256: cd2cd213b08e16b57085d40aeb886299bec77b8d34523558165943e50aa02cf5
196 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which host further PDF files, indicating a link farm designed to distribute malicious content. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to trick users with a fake lottery or parcel delivery scam. The ML classifier and ClamAV detection further confirm the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/e8ofta838vsbfdcumfvh1s0lev/xisuwifotepekadelukikomi.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/0f73a96086a64c43f8f599c1525c288c/jonil.pdf
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/e246d38e5ca5eb33372b7c2282605fbb/47415785614.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2f5317d31---dupumumemebo.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/4bohag9vn7d5kgs9rohggqlm6n/sufekidimibiwopebanuxov.pdf
    • http://lexen.ca/userfiles/files/fuboretuparuluxu.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16086939ee6b49---98403170638.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606c90b00c409---jijivesut.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/708d78da1fc27d429b3faa602ed787f9/xevilokubapawiluwawanuri.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a402a412e---paxapore.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088179b0bb44---rabidazalofib.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7c5fd9484---11816804314.pdf
    • https://acrgroup.nl/userfiles/file/gilirupabeve.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/0d642914f8f7394c155324e9399edb7e/18130151974.pdf
    • http://reelproductionshd.com/userfiles/file/77231174427.pdf
    • http://beiwendq.com/userfiles/file/68483142663.pdf
    • https://heks-tech.com/app/webroot/userfiles/files/97266192076.pdf
    • https://seeandhearbetter.ie/img/shop//contents/polotevo.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a567537e8cd---80852762412.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/43635ad64b4726ca84580e22e5a214b5/61748956253.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb48ea1e14---61746490963.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba042422ba9---17631174621.pdf
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/fefidenazuleb.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=south+african+population
    • 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_off000108c7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x108C7 16792 bytes
font_01_sfnt_off000120de.bin
cd051cc4f89552a3be775dfd5cf31c1b17e3fa29df6ee78473e623dd0b1a00c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x120DE 10452 bytes
font_02_sfnt_off00013881.bin
7ac504204f2d4acd5b63e7fa1f533d20b502dff61e317fa994c37ef22b949f4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x13881 16940 bytes