Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f45d77e258d98c…

MALICIOUS

PDF

82.3 KB Created: 2021-08-26 13:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ae88c0db24904765d89e4d044af07fd6 SHA-1: 629b81d8a93b37f1fa81cd1db4451ffcc2571054 SHA-256: 01f45d77e258d98c87b652a8ca01d2c838809d37fe52c69640b7b340c1a765b0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to potentially compromised or disposable hosting sites. The presence of multiple PDF link farm indicators suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/7h32d9uc1u454v79b6t2sgpnuh/62526732065.pdf
    • https://artasedanasingaraja.com/uploadfck/file/64485328489.pdf
    • http://www.oomedia.com.tw/ckfinder/userfiles/files/zodezotetedimefu.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/emi4oire2igv6r3pdj60nidsop/mowukuwepifer.pdf
    • http://olgapolyakova.com/files/files/92304400507.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/f1cb5bc4e1f5762a3f9e114b143d911d/juvodaporuruwoz.pdf
    • http://abwsalisbury.com/uploads/files/zorumareme.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076204333455---junipuwepaxapewimabud.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/m4vpptdsk9fvsdosdrr50nmho3/begefu.pdf
    • https://edubox.mn/uploads/users/0/files/13134881566.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/aeugugo4b666446on6qa18m1se/geniwelezezeli.pdf
    • http://asiadomainstore.com/userfiles/file/42586608429.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/2131a9106616035b672f9d36e046f662/titewovumifavowolukidole.pdf
    • https://comptables-publics.fr/userfiles/file/sofuzofupafuwebivufonub.pdf
    • http://gtshotel.it/images/file/34329776249.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b15da9e10d---jodemaleponovujasowe.pdf
    • http://dlzj.net/upload/files/20210731043648861175.pdf
    • http://uk-finansist.ru/userfiles/file/kidafidugabasafel.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/b76053a72e27f0650d5055b173650975/vubaxoxutiwabodewemomu.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/dacee417744d6cb08ca56c6729909f56/32026967145.pdf
    • http://gursakaryahukuk.com/images/file/9882461093.pdf
    • https://wita.lt/images/files/tivagikuvow.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=difference+between+unit+test+and+integration+test
    • 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_off0000ddf5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF5 16792 bytes
font_01_sfnt_off0000f60c.bin
ed1f24e9a79fa1a51a0a59f077294c918d354ca23b72712192c96a633ab64ed7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF60C 10932 bytes
font_02_sfnt_off00010f62.bin
379078342843dc930bc0d4dc526332f50c73d7d3f350b0d5a04fc7559f9de6d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F62 16276 bytes