Malicious PDF — malware analysis report

Static analysis result for SHA-256 2348ba12efd9a55b…

MALICIOUS

PDF

82.3 KB Created: 2021-06-28 11:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de29677ec18a178da688d1afb6c9d6fc SHA-1: 405e4cb031a181cef2d141c98d55f76c7f962183 SHA-256: 2348ba12efd9a55b36ace1c3d54aab3500245320dee37ffa8c08f73ca81f1051
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ML classifiers and ClamAV, and heuristics indicate it is an advance-fee scam lure. It contains numerous links to potentially compromised WordPress sites, suggesting a distribution mechanism for phishing or malware. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

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 http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16080f6cbb05c4---66935359777.pdf
    • http://marcelponjee.nl/ponjeefiles/file/33237710558.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/5ccde42a758594fc18de58f0b01235ba/47487622280.pdf
    • http://atdawnwelift.com/userfiles/file/53175774944.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081c4b44e4ff---ruluxipitituxujuza.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/1b13b2815575b19ca280217658149dce/77657162771.pdf
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0f57334b1---kotowezudaxinu.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/b2c58d33b0643ccfc75279ac426798ca/zurarutonaxuxipexeb.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a9a8c3b58---8933399756.pdf
    • https://mygo.com/ckfinder/userfiles/files/kepazutisotib.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/80b557823ac822069484016d7adc4343/43688858559.pdf
    • http://jrpst.pl/userfiles/file/minazovefujamusodil.pdf
    • http://zonwering-nederland.nl/ckfinder/userfiles/files/vakadawuganifigamumobor.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/4af2498a7a83def69720bcf0984f4030/wefeku.pdf
    • http://septumdent.com/img/userfiles/files/21190518703.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/41188054036.pdf
    • http://greenbrier101.com/userimages/xafoval.pdf
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/2760295a26ab34435f40b00e0040f26a/felugirovapava.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5fca8b13c2---nupavesub.pdf
    • https://fertilizergranulatorprice.com/d/files/wipusedobeveroz.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa1657450f---71099407780.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/581349d11022ee5947a0db702d29d889/dufipuruzojarinu.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/ab14263f72828ebf2cc29fa4ac11c4d2/bezetavujulasuroxurovedo.pdf
    • https://akproauto.com/nbloom/fckuploads/file/kawan.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+play+apples+to+apples+express
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d28d.bin
164b17f13be751c428b8a7847bfef4401e4c17c2bf41cfc2fceec83f5d69c6ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xD28D 1728 bytes
font_01_sfnt_off0000dac7.bin
da3e2ed2b2f44aa7c3b0fb6dc0d99516103a2a74464b22e3818f28a76ebdc4d7
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC7 10344 bytes
font_02_sfnt_off0000f265.bin
0b3bb7d2e713925740c2cc7bb0ca52444d7e26fecedc4826fea9d0f526cc5e08
pdf-font-stream PDF embedded font (sfnt) at offset 0xF265 18396 bytes
font_03_sfnt_off00012303.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12303 16792 bytes