Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2cf659f68836e96…

MALICIOUS

PDF

198.1 KB Created: 2021-05-27 15:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: fad730f39d4ac1aa312b6b18aab8facf SHA-1: 0412bae35b67bdddcbd4d78acd2810c0c5db36fb SHA-256: c2cf659f68836e96a1f96523bcb6e96e5ef356ce16ebc41eded2da4d818824e1
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of embedded URLs and the nature of the heuristic firings strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9858

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.
  • 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://crysiq.ru/uplcv?utm_term=does+tanjiro+master+fire+breathing PDF link annotation
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/igi0gbkk3c3uip27cqsbls9un1/novizupitujituk.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/88867714e58580ecef4b236db45d03ba/tejaselijigijisitetugabef.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160923564e0723---devapebodixosolanas.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/7fts3o32avi7nd7lv7cr4ugqr3/82622007157.pdfIn PDF document text
    • http://jkmdc.com/aversystem.com/userfiles/file/pejamamiguvamamodifugamal.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/44700cec4f545a7b36d5d11b3d48026e/zuwuvabedejajepejelafa.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/279d1ef2b0f8bb5b75b3e7c74119246f/kidojerapovudogad.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/zixegumijasuxirase.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/rijolo.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907612d3502---90399356950.pdfIn PDF document text
    • http://dgjst.com/upfile/file/zuterupulir.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780c6611b0f---wigibalesefilapavulesaba.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/roruwibusigaxidunureb.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/munijukixelopo.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16082ee7e612c5---57116257499.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/a8fd6a5654130b231c665b05557a31e3/19862313033.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001cf3b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1CF3B 80324 bytes
SHA-256: b6695a14625d74b9d3a296bc455ac3c1cf44585807367f1e8152ab818f6b9198
font_00_sfnt_off0001baf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BAF3 7900 bytes
SHA-256: 033f5b4a9266217e0f333f6f24bd5ebc40116e2d0b32af82976dea6d331db2e2
font_02_sfnt_off0002c122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C122 5364 bytes
SHA-256: 89e94454cf0099dc8a1c5152d961404739367d6bcd4b9fb4c1662378051b3038
font_03_sfnt_off0002d33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D33C 2788 bytes
SHA-256: 3e91fb548ecedb1c50c30e133f6f64ee5dd4ba32f34fc234db900190276c1e11
font_04_sfnt_off0002df0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF0D 12224 bytes
SHA-256: ab4a617fc02c955d66636a1c5624d8176a03753bafcb323993963de3ad5875e5