Malicious PDF — malware analysis report

Static analysis result for SHA-256 040c105a09dd8f3d…

MALICIOUS

PDF

70.7 KB Created: 2021-07-06 20:31:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 6ecffc991d9149e5e1d8348e8d952e3b SHA-1: b3b97cbcb401c96336352d1ee71896d880c45bb0 SHA-256: 040c105a09dd8f3ded63999385352e958bf4ee7d6bb37ff31a7fcfac650d78f4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6872

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=billie+eilish+record+of+the+year PDF link annotation
    • https://meganimal.pt/site/upload/file/lalamavetopifugo.pdfIn PDF document text
    • https://cmoretv.com/userfiles/76032993390.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16097657a91d21---gasapexigoveku.pdfIn PDF document text
    • https://basisnomor.com/contents//files/fisolepirodeba.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081716ef1f20---labafigeganawapel.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160abd2e147aca---55270123015.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160bb242b86be6---58455680383.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/98342843631.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608efd6b5f83e---nofawixawupewamuboviwoxus.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d42023418---newujegoginefosu.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d184271d7---23800623881.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/940i7358sp4p658mj5krrnoq0s/jutamatorarajebalez.pdfIn PDF document text
    • http://thedreaminitiative.org/Content/Admin/uploads/files/balifebebubiwogezusipa.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/mewurufukofomu.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5f1c736f0---gumesepomojipabedoze.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb6cce4042---figotisumoveri.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ffb34d128---mupubobagit.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bde764e612b---96605897879.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089100542f10---29229002615.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7981861bc6---nebixekikarob.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/e6bb339510e3fb1fbe8f5a684d19ec4c/zuwesafajamitagifemi.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761d3a2ffa5---lafobovuvoxixejo.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/58220866803.pdfIn PDF document text
    • http://waelfawzy.com/userfiles/file/75517457402.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/denasufagokigibijekupabud.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B2 17436 bytes
SHA-256: 076af03d0f4a3d84da5b05cd2a04600a05c86b10c634a73aceb4c60a5d4e493c
font_01_sfnt_off0000fdd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1