Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2cc98e308ecb84e…

MALICIOUS

PDF

77.6 KB Created: 2021-09-01 07:35:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4606446162b7a231518441bc54cfe4fa SHA-1: a4dc00f4d2c85f4bba59ac423772ad80ba17d218 SHA-256: d2cc98e308ecb84e3ca3915a5345cdc4b64440b57075ab28e4b96616c8f68020
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress installations and disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2890

Heuristics 5

  • 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
  • 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://crysiq.ru/uplcv?utm_term=determine+whether+the+set+of+ordered+pairs+is+a+function PDF link annotation
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16082bc7b7ce99---betuxidaban.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/0e7a640d30969fdefe012353c1827918/64816308494.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/dirixofifejubisononuwurod.pdfIn PDF document text
    • http://wdnederland.nl/file/xekubejirawotateretegu.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/80487013467.pdfIn PDF document text
    • https://farmacieitaliane.com/documenti/file/92727325631.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a400c8bf921---bidilezojebudanuritirop.pdfIn PDF document text
    • http://kargo-box.com/uploads/files/67416541814.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/16431153241.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afafbf58bc7---44376172360.pdfIn PDF document text
    • http://nhasachconggiao.com/luutru/files/papajowev.pdfIn PDF document text
    • http://compsult.net/userfiles/file/pafiwezigam.pdfIn PDF document text
    • https://htlexpress.com/ckfinder/userfiles/files/1238939037.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/sekafakajewigeg.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/90138206547.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/gfgdao5f9e554vqm9adf4afkbg/36107875647.pdfIn PDF document text
    • http://midlandhigh79.com/clients/866549/File/fagikomeripozavediwis.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/rotedejegudasikam.pdfIn PDF document text
    • https://chezgregoire.fr/userfiles/15395090558.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/ljc0q9gjmbh2av0mnvnvpr11q3/19731246392.pdfIn PDF document text
    • http://nghieuphong.com/upload/files/35707459495.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bcf6b4c3e3---39748308305.pdfIn PDF document text
    • http://chromavials.com/d/files/9351860851.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/novuruniga.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160852a4406792---manodowabojujawoxigupogiw.pdfIn PDF document text
    • http://rjt1.org/upload/files/17628391505.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbf410af6e---67316851541.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57E 11024 bytes
SHA-256: a1dabd609070ddccbeaa7a78c74b51874717faa5c0e87a73e42602856d3b3815
font_02_sfnt_off00010f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F03 17504 bytes
SHA-256: fabf3f696be3b1a968002ca9308129be638f791362177735742648dc60ec5945