Malicious PDF — malware analysis report

Static analysis result for SHA-256 e112fa94127562c3…

MALICIOUS

PDF

80.6 KB Created: 2021-07-10 14:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6640ad83bf52bf10ac49479f098003c1 SHA-1: ce3cb1f7b87cbd26b593d1436d9ace4fc8a5b7bf SHA-256: e112fa94127562c3da8a53b93643f2143eee9de2fe01a78b56e546ea3a876a8b
156 Risk Score

Malware Insights

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

The PDF was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external websites hosted on compromised CMS uploads and disposable domains. The embedded URLs suggest an attempt to lead users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 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://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/mqa4sparc124so785kjptkq2e6/mafojojexidepimadoze.pdf
    • http://praxis-greve-polley.de/web/editor/files/tibegimu.pdf
    • https://vvpta-irvine.org/userfiles/file/galipebedevagux.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/j3jkcvv0amsjega1mlj48j1mv5/31106578409.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/c64fb11efa6df857506f221bde4ac865/geveba.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a8b086e4e---32143408422.pdf
    • http://ketnoikienthuc.com/upload/files/jikeresajuwep.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/eoiod5h5vj8kei9u8ciapt9d9i/rojapukotulanodu.pdf
    • http://artecgroupservices.com/imagenes/file/bazaxikuwotuduf.pdf
    • https://fcr-fomentoconsumoerenda.com/uploads/files/75209797667.pdf
    • http://uci.ir/userfiles/file/73094578238.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072fd5dabb3b---gosasikelaxizun.pdf
    • https://festival.bg/fckeditorfiles/file/bijelekowud.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160890f97db824---33712116782.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be910db09e---jegowazolenadazi.pdf
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/50818ad8697be30b796419380bb5bfef/rosovejigosogebi.pdf
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/28d1cdd8a45b0e295c997e386f6a9f26/fedawi.pdf
    • https://noithathoaphat11.com/upload/files/80938403272.pdf
    • http://srutimusic.org/userfiles/file/62133355272.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a251af1d5a---vujasetine.pdf
    • http://scuolascifondocortinadolomiti.it/userfiles/files/58850907536.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c87f00aa---64161320495.pdf
    • http://dobre-jaja.com/Upload/file/12022636774.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/b8daf04df31485a12841647d7c5d4689/60448938310.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=carrier+haulage+and+merchant+haulage
    • 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_off0000d98e.bin
7afe47f63bf9d479d06457c2da64b7b95e690f34db2939a7e8bd382bee7f6a59
pdf-font-stream PDF embedded font (sfnt) at offset 0xD98E 16940 bytes
font_01_sfnt_off000104df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x104DF 16792 bytes
font_02_sfnt_off00011cf6.bin
b5f05a1c4d1dac2ca5f0ae57205d39f4bfbcdc2af4f96e342295a3ce2fe2a34f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF6 10660 bytes