Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6029c4fb89af983…

MALICIOUS

PDF

87.3 KB Created: 2021-06-27 16:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bcb75084a80c1083c4fd54e57a52a937 SHA-1: a6c96c010b79c886420f49ab8987dc1392450d30 SHA-256: a6029c4fb89af9837325bd962db0560122577825ab9785baea4740f59f61ba36
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure as a link farm on disposable hosting further supports its use in malicious campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://akicgiyim.com/userfiles/file/kikotibox.pdf
    • http://maduraigarlandshop.com/userfiles/file/36491939241.pdf
    • http://atenngo.com/admin/sites/site/documents/16265021482.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c987eeea86---3069569393.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/0sme81eri33kerq9hbfdbtlk02/sawipixovimomobo.pdf
    • http://seoulsquare.com/userfiles/file/kasologif.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/75c06a9af96d28da66c85c7ed3f4177b/93055864838.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929ad44f822---37308566017.pdf
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/falezanakutoginek.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/f13e07e780fc3b35fa5982ff3a6de9e7/govozuze.pdf
    • https://jdlpartnerss.com/userfiles/file/nabexaradepatukazavo.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/b9omodkch37isirbbjlkg0en77/17893207226.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160987e7414119---714277819.pdf
    • https://sambelteri.com/contents//files/12102042681.pdf
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/887c6f4a5743e17e6ccdb18028668325/92630746321.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160afa2cfa09d7---73897703998.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/fkk3qk5jih0nl7bovvh8t64em7/wavetilotaviwovot.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/efcf2844768533c8f1476d7bf50c4063/vowenawewopubagigadiz.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b0384c073---37366849248.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089142d64e26---mebawobugadi.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0a23a1987---6037452142.pdf
    • https://bookatowncar.com/userfiles/file/jaxibameku.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=candle+grbl+tutorial
    • 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_off0000e2e5.bin
d2df60ffd4bb49a784cf2ccaaa0041ef23c8b7ce58f9dfa5f8e0925f31d25a62
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E5 29224 bytes
font_01_sfnt_off00011e97.bin
7ffb33ad182e1aacc2aa58a497f96a70c34e89284e5167787a3a1a5b261ee68c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E97 10524 bytes
font_02_sfnt_off0001366c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1366C 16792 bytes