Malicious PDF — malware analysis report

Static analysis result for SHA-256 0803b26cabda85bc…

MALICIOUS

PDF

75.8 KB Created: 2021-06-29 23:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e6cd870167ea89e7fb4970154471c6ce SHA-1: ae2f5df5e062625c5fec56be950bf8a372e69898 SHA-256: 0803b26cabda85bc8a28261f7b1bb5812b564901f69a855839d0643712238117
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised websites and potentially malicious files, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://tepihtrava.rs//files/wobuvafimif.pdf
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/1e2642ca3e2aa03bca92ab6a3447b6e2/puxabolojakugimamuxil.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd75990e6c---setifovu.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1608c34690f5a5---80705680689.pdf
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/0c3442f1855e517cf2724bf692bc8626/dusogafezatoto.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/mmv066ukg1105m49q2c8e1lm0t/jodupupupe.pdf
    • https://efnnma.org/files/file/vubesewekus.pdf
    • http://macabrey-luthier.fr/data/Files/45947096863.pdf
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/5794475e39cdc5a6173c26d2680c8d0d/pubunufaxuj.pdf
    • http://www.annaleehuber.com/content_files/file/mupazitisepexokus.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a866de6908a---dazus.pdf
    • http://automsystem.com/UploadFile/file/20210515110955623.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/a1c58da58970f4e55caceac7b508604f/nonipuvimaregizurob.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160abd128dfb20---loxaxijiwosewulivupelefel.pdf
    • http://alemotta.com/resources/original/file/fijukotavigidexafugafem.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/ed6a23336b3be0f2f82ac703dd6df372/sunuza.pdf
    • https://aravlicraft.com/cmsCart//upload/file/65693999695.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607aff0bc6cb9---74435041871.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/dfe1bdc407afbdcc6974373fa5e72636/12605928556.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077e3f6438a0---83758769917.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/35720bae30f64aefa8b003dde04e7eb9/12943490133.pdf
    • http://guides2alpes.fr/uploads/file/33730623579.pdf
    • https://peterdegendt.be/file/daxarukotozuzidagirise.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608271c4a76e6---mexurum.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=definition+for+exclamatory+sentence
    • 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_off0000c1e3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E3 16792 bytes
font_01_sfnt_off0000d9f5.bin
2b667ba336a975285758ea0ff4c73c0585720fb27034b9c6e935f92fd7e30693
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F5 17996 bytes
font_02_sfnt_off000108dc.bin
aca515aca14de1ad8af6365f708b490c5338901bb135dc200b7aa4d8a06bac2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x108DC 10712 bytes