Malicious PDF — malware analysis report

Static analysis result for SHA-256 29025646b53052a0…

MALICIOUS

PDF

68.5 KB Created: 2021-09-24 13:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7ba9a9bfedea18c7ee6e440bdb22f88c SHA-1: 90082c003bed0974c2af9e716f16bb54f15f72e7 SHA-256: 29025646b53052a0f12871c4e513eae5f28201f8c2bcb7bd3163406ca893dd10
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains multiple heuristics indicating it's a link farm hosted on potentially compromised or disposable domains, designed to obscure the final destination. The presence of external URIs and link farm indicators suggests an attempt to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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 http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc1296d8f6---xaruxoxakukuto.pdf In PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/xiwegasuz.pdfIn PDF document text
    • https://drddvichitra.com/userfiles/file/83547228166.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/loxademudoni.pdfIn PDF document text
    • http://cokhihoaiduc.com/uploads/files/wumepizel.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/61162257510.pdfIn PDF document text
    • http://severstroysnab.ru/userfiles/file/gizanab.pdfIn PDF document text
    • https://nasikampung.info/contents/files/77550489710.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/0c25a9378b32df4fc104bd70fdc2f2cd/27754355029.pdfIn PDF document text
    • http://air-con.ru/upload/files/tobefad.pdfIn PDF document text
    • http://uts.edu.co/portal/app/ckfinder/userfiles/files/pegevuvirawetuge.pdfIn PDF document text
    • https://10s317.com/uploads/files/202109180929327623.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/b2f7f21f41c218f3681dc8124514687d/vivipazobasakubudum.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/tebojowarukuvimak.pdfIn PDF document text
    • http://avtokit116.ru/!upload/files/remosekokekepenujej.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/tuvidobavijetikunaxosog.pdfIn PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/wegixipugaxefofa.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/91969861837.pdfIn PDF document text
    • http://max-metal.pl/gfx/file/2275868372.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/xuroguf.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/62342875190.pdfIn PDF document text
    • http://www.sloepverhuur-debiesbosch.nl/upload/files/sezizomixoveporig.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147cccc4a559---59975131556.pdfIn PDF document text
    • http://lachambredechos.com/userfiles/file/52897066127.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=tiger+woods+pga+tour+14+androidPDF link annotation
    • 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_off0000aee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F8 10800 bytes
SHA-256: 62b880b727862bd9fe651821708418f12eb4b43bdc4942a4723688d97bd2449e
font_02_sfnt_off0000dfed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFED 14440 bytes
SHA-256: 0ba8039440112e0111d6ce642075bd09ae0f390781bdd88a98a020dccea0f07d