Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e59c6ac5ea6c492…

MALICIOUS

PDF

81.0 KB Created: 2021-07-09 01:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 469cb045f325dbd49619baf3e6d8fcad SHA-1: 071d34b33a4653fa841ae1c722c025f3c325dd9a SHA-256: 0e59c6ac5ea6c492dc11aba6aed6e3d432ab5e74964b079b0213e5e6430ae780
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress sites. The primary purpose appears to be redirecting users to malicious content, likely for phishing or malware delivery, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://archism.ru/uplcv?utm_term=principle+of+comity+example
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/05p07fskv19kcc7givo71d1dnr/zuvutonuvovoke.pdf
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/m46jnhfnsedirvjv7edpjferjg/gubuware.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16080444386dd6---30044888563.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/io7gl8n8hkfkr9e982mp6h8na3/nerevadili.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16078c4e09cd01---tujowafusolimotaxepose.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b37747313ed---tugixo.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b68c4122ef---xakebibemowuroxo.pdf
    • https://hkparkkonutlari.com/image/files/90491960581.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42dd296dcb---13614452214.pdf
    • http://maility.pl/_ADRESuserfiles/file/mufozunejepufu.pdf
    • https://mecaniquekd.ca/upload/file/94545748732.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a50136dff8---nopewusisavunegabapijunox.pdf
    • https://novahealthclinic.ca/userfiles/file/59329562258.pdf
    • http://pozitron-s.ru/userfiles/file/vinuduselakoresagi.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c17ef013bd1---21398686578.pdf
    • http://cngwalk.com/fckeditor/userfiles/image/93952949970.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7aa8f13899---bajuvuredapagaweto.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d1b58fb55ea---16673907030.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/0738e2321393ce1bf938b3e3dea4db8c/72961005805.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16096b8917247f---lasiboduwovod.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/75e716c2c4a0ee3811ff15db885d5d98/6517993072.pdf
    • https://vieiras.pt/imagensprodutos/file/16102564528.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078c8bd45c54---sezeladobotesedowoge.pdf
    • 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_off0000da16.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA16 16792 bytes
font_01_sfnt_off0000f228.bin
16d34ea3abb530ac8d93a5738271ae49dcd86a5691e4d2d6acbaea2e70ebcf7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF228 16932 bytes
font_02_sfnt_off00011e22.bin
a19ccffedcb39f998ccf5b2e4ddf881fdc25bd2e417e9dfa83bd938a9215308c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E22 10688 bytes

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