Malicious PDF — malware analysis report

Static analysis result for SHA-256 04cf943738f612b1…

MALICIOUS

PDF

85.0 KB Created: 2021-09-17 08:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a0bea41767d42448e5544df66976c3df SHA-1: 953136bc9cb875702a9917e8b5457004d6a03133 SHA-256: 04cf943738f612b1e22a507584d63bd5799f80231435f461eba89ce502060374
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. The document body is heavily obfuscated, preventing analysis of its specific content, but the presence of numerous external links strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://drafthe.ru/uplcv?utm_term=taraxacum+lower+classifications PDF link annotation
    • http://sun-tes.ru/files/file/sugufugosatojajikat.pdfIn PDF document text
    • http://ambvetesopo.eu/userfiles/files/sumip.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614013479e6ec---fekofetijadajifonufefi.pdfIn PDF document text
    • http://sostrevalli.it/userfiles/files/51176145744.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc58a53a80---50157583838.pdfIn PDF document text
    • https://cvconstructionsgoa.com/pharma/admin/userfiles/file/sumaram.pdfIn PDF document text
    • http://voijin.com/userfiles/files/87550944211.pdfIn PDF document text
    • https://nordavril.com/userfiles/file/fogapiwafiguzo.pdfIn PDF document text
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/pisupebelovododoxiru.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/jozidavumiregolokudavetu.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/vibepakug.pdfIn PDF document text
    • http://enjoybowlramenandpoke.com/uploads/files/46323589345.pdfIn PDF document text
    • https://infrapanel-alegjobbfutes.hu/userfiles/file/59481188130.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6c3311985---59494227866.pdfIn PDF document text
    • http://plechotice.sk/tmp/file/19866419403.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/60849076590.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/jebadipemegufasog.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/zolukagovesodirogu.pdfIn PDF document text
    • https://rawoctane.com/uploads/file/72462479470.pdfIn PDF document text
    • https://xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/dejan.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/aa6faf31f442e4cda4b48728e755f2c9/64455007083.pdfIn PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/8725533911.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210901_00531A6CFC0F0283.pdfIn PDF document text
    • http://funagamex.vn/PhuongNamGroup/userfiles/files/mupojufuzikuxi.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/domikomaz.pdfIn 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://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_off0000e074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE074 10748 bytes
SHA-256: 7ab54b08aaf5e8b04235e57c689a877c6149311bc294497ff0abd24449f0ea94
font_01_sfnt_off0000f94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94B 19788 bytes
SHA-256: a07f6d23daa7a67efe44e6c26ca51ed3a451943b7f442325bdc30969986bba84
font_02_sfnt_off00012d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.