Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9e591ace8a44c61…

MALICIOUS

PDF

98.9 KB Created: 2021-07-02 03:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ba0268bbd8d6f242b5b2ee316aaf730 SHA-1: dfef5afd95c79334d2665db49b788bf02a933fb6 SHA-256: a9e591ace8a44c610273378f87a9f318c63af3e4ba16e4dc59875d337fdc24de
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised or disposable domains, likely intended to lure users to malicious sites for phishing or malware downloads. The presence of external URI links and link farm characteristics strongly suggests an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://sitoad.com/bbqjoekey/files/202106082346422019.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b41b2c6690f---93858298211.pdf
    • https://amthanhanhsangchinhhang.vn/upload/files/68016391536.pdf
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/kabuduximobebukotudov.pdf
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/25268698714.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/0l9favo2v2rgq1ufvedssu498r/rowaki.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a23b59a5d76---12424693154.pdf
    • http://jaika.in/images/documents/files/tefid.pdf
    • https://menlopark.com/wysiwygfiles/file/renokuwidogazosazotusuger.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/df322fb48fbcdf79156f025f0e3d45fa/20446195325.pdf
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b6333d0a5bf---tozil.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/ffd7ce5b8e6aaf266698f72120792942/10719683137.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16091b78488258---87034698580.pdf
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/36972082062.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/137ec4989fbc68b4bee2013056e44058/17235300740.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/98u2stlsv7ce222qr5smlkd516/46620895813.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1609754ebd6e25---63263689709.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160d626f2d4bea---guvifunakiki.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/118c3071ea8c662caeee47f7c7762fa4/nogepozeninalowubobo.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/ceffa2fcfe8e2cce3a55bcc676f5a6fc/nesatex.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3dfcd0fd3---51896635042.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/5696ccfc17d03c9c32498327f6737fc6/23374898363.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/6968559ab411bc711209f7c2258b7dcd/sunemanuvefed.pdf
    • https://nestaerospace.com/uploads/file/73067238835.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=sonali+cable+songs+downloadming
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011edb.bin
a516f238b87cd25ac4e7504e2cb270acf06603734d24dc6f27b3064dcaa04cad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EDB 10816 bytes
font_01_sfnt_off0001379a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1379A 16792 bytes
font_02_sfnt_off00014fac.bin
bebca5ed22325bdb6fb9a6a32ae61da3f26d35641df0dc0c70d5a88d4f56284f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14FAC 17600 bytes

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