Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2ed13a92f4a9d0…

MALICIOUS

PDF

65.9 KB Created: 2021-06-17 05:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ece864fb92a9e2c5664f93f73d19be8f SHA-1: 369681a1710cb7105789e00f9a1f2a104ac1f719 SHA-256: 0e2ed13a92f4a9d0ce5547dc0f072a2e69475496f5a37e1e5d6ed4a73eb0c8be
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains a link farm pointing to various websites, some of which are hosted on compromised WordPress installations. The primary URL, https://coretry.ru/uplcv?utm_term=xxx+games+apk+free+download, suggests a lure for downloading applications. No scripts were extracted, but the presence of multiple external links and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9706

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://coretry.ru/uplcv?utm_term=xxx+games+apk+free+download PDF link annotation
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/p60sevutqfkqtqd91kjv2pp4g5/kuripobonozedida.pdfIn PDF document text
    • http://eszixv.hu/ckfinder/userfiles/files/jekigobudojikoli.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/13bf538416e9f0de7d40993f4dd3a53a/16219928677.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b14b9a544---widimovuvitumotaxe.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/aa18afc76e74ba761da1866362a06e22/dupekakipuvevog.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0343fafe05---difebelozifuwatap.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/sujukogununejigegewif.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/zizojibimisinufebi.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079f56e33aaa---52287015729.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608118c753d0c---13856016690.pdfIn PDF document text
    • http://highlandcougars83.com/clients/2/26/268573c5102cd00412bac87cee9346ec/File/xedupinifik.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/b109aa72f53613a71cf1255bfab394dd/bidalomunow.pdfIn PDF document text
    • https://edarky.net/data/file/82796359352.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/vebekijunuze.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d46e5595a---gomotenokenetolekaguwovix.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7abc9192fe---pakigukatekixakiko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB8 5564 bytes
SHA-256: bc5c713dd7ba62b6c5d7d4f8475a1bb6e079d91c206e055424f179dfa949059e
font_01_sfnt_off0000e2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B4 10792 bytes
SHA-256: 1654a18808c283261d34d597c5e6c8ea4ea53be3b375a71d7084a078814ce03f

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