Malicious PDF — malware analysis report

Static analysis result for SHA-256 18209afba04bee42…

MALICIOUS

PDF

79.2 KB Created: 2021-06-09 18:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f7a328314a02b344cad6990610ccb185 SHA-1: 253fce5aba02a02a1effd9b4a6e61ebe57a10c74 SHA-256: 18209afba04bee427046c5fe9be2e7aefeadc095821c1729af9427ac8f0c0360
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains embedded URLs that lead to compromised websites, likely serving as a lure for users seeking cracked software. The presence of multiple external URIs and link farms on disposable hosting further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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://allytemp.ru/uplcv?utm_term=crack+for+3ds+max+2019 PDF link annotation
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ad122ea2758---35081081287.pdfIn PDF document text
    • https://actor-conseil.com/files/file/rotapu.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/7th8gmaen4k19e9vdllvh9obvp/81025936615.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/84069768889.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/270427e1306a4fbf0cd3ac4d29972558/tunudemevediseratobipi.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/rjosjgcsaq6jkbp8tvoaf3fhpa/pubot.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/japisirepavanatu.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/617619f3dc55ebbab51bed6a77e8f036/71759605797.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/c1194647585b66e8741cb5ff239c9f68/85562784858.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/9bd05210c66298618f85dd878a70b874/11810914786.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076c5166a001---vafetumasarozuvife.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/petajezeg.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/b6df6f32c49633ec31884f6708861d5e/75358738655.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/3327345681.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/cd70f89d359a632d4c5ffacd60bb8e65/sonilutagejopibito.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/a5e35235fd186317f0e8f8f7544a8453/deduletatexobulijabepe.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/lefugawadiwakovatuwuzaza.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/76475057941.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000e6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BE 5816 bytes
SHA-256: 7fa5e8b0c11f0d42d24171b02d87c37927fb2c2bceec91b1428d71c6d57a9b26
font_01_sfnt_off0000fa79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA79 23532 bytes
SHA-256: f65fc46305854d24c3175b8ee518276806e435f75a6b4a4db109360f070f0fcd