Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aee7ae0588f42e0…

MALICIOUS

PDF

91.5 KB Created: 2021-09-10 18:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b90a700d2bf98f27f682c146445a118a SHA-1: 219001bdd7900031483ad732ba83b934acbe4986 SHA-256: 0aee7ae0588f42e0705020b0543ef01d6beb143c0b56e56bee9c402746c8c0bd
126 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to various domains, some of which are hosted on compromised CMS platforms. The ClamAV detection and the presence of multiple external URIs indicate a phishing or malware distribution attempt. The document body is heavily obfuscated and does not provide direct textual clues, but the overall structure suggests an effort to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2989

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 http://steakpluspizza.us/userfiles/file/69572008683.pdf In PDF document text
    • http://retailcop.ca/files/katukigagabipome.pdfIn PDF document text
    • https://konyaalotaksi.com/userfiles/file/dazugemusupamonulovuvijis.pdfIn PDF document text
    • https://alaqart.atelierleuthold.ch/userfiles/files/54302122252.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/2b8349a0ec79a0ebee032ac988ed4fca/vodinawexegejevezere.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/besawobokozafom.pdfIn PDF document text
    • http://www.badischer-kunstverein.de/ckfinder/userfiles/files/11301330904.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/18382946025.pdfIn PDF document text
    • http://hwangtosidae.com/userData/ebizro_board/file/90972336512.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/fepebawobabojev.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/jijopususurojumagutejo.pdfIn PDF document text
    • http://rsti.biz/files/fck/file/maxapule.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/fekoxoxojenebugisaxizetu.pdfIn PDF document text
    • http://eapver.com/upload/ckimg/files/202109072348279309.pdfIn PDF document text
    • http://tyextractor.com/d/files/6895819822.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/65754121038.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16137eb42d532b---18185938203.pdfIn PDF document text
    • https://watosaphotography.com/app/webroot/userfiles/files/20210903_022223.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/161354bc4a048c---zewevekop.pdfIn PDF document text
    • https://sushixusa.com/userfiles/files/begifejonarap.pdfIn PDF document text
    • http://majortaylorride.info/images/uploaded/file/29850183773.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/vetesunevirinodamo.pdfIn PDF document text
    • https://yoimart.com/upload/file/20210903084850.pdfIn PDF document text
    • https://red-adlay.com/upload/files/50400924810.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/zazutovofulanu.pdfIn PDF document text
    • http://whatcanidoforyou.eu/publish/file/12539130122.pdfIn PDF document text
    • http://dainindo.com/Uploads/userfiles/files/58604471180.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=percy+jackson+and+the+lightning+thief+book+downloadPDF link annotation
    • 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_off00010914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10914 19244 bytes
SHA-256: bf9ac5cbce7cb872597dc4ece030a6db6083242085494208feea3fde89cc96bf
font_01_sfnt_off00013ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000152d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152D0 11320 bytes
SHA-256: ded616423f74c1575e74ebee6f6c2f950e845acc1c20548c5a8a88ecc2d020db