Malicious PDF — malware analysis report

Static analysis result for SHA-256 67379cea5f1c01d9…

MALICIOUS

PDF

81.8 KB Created: 2021-08-15 21:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 41f24603af0e5c00f82e05ac520f14a2 SHA-1: fa825888c0f2d2b08a94a4d74ab0fba85b0f3c7d SHA-256: 67379cea5f1c01d9d86fe7ae7221f8b1223a60bd8e86e047d342a68fc481d94a
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous embedded URLs that point to various websites, including those hosted on compromised CMS platforms. The presence of these links suggests an attempt to lure users to malicious sites for potential credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/pinizapov.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078dadef37d4---wemeguxoxigevezitafodevil.pdf
    • http://krevue.cz/UserFiles/File/1568499965.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076580ca3ab0---sidixeguvomi.pdf
    • https://noihoithanhtuan.com/media/ftp/file/14904479547.pdf
    • https://majorsagilekvaros.hu/uploads/file/45822685618.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1065c6d1d2---81009111855.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b71080ddea---54731916523.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/db5jmmrhjfoeap144shsjohit3/xibamabuxujopekojitugejev.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/d44nhv8u53leds2lajlrjbm2r7/vitelu.pdf
    • http://wolfpackbasketballacademy.com/content_docs/gebafojinebagebijuzoze.pdf
    • http://theleadershipworks.com/PO2/UPFILE/userfiles/files/52841214487.pdf
    • http://bjhtdszdh.com/v15/Upload/file/202152122595478.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/fda0cb2d32839507fc0847bb4a81d2c7/29348576255.pdf
    • https://motty-etai-sharon.com/files/files/46528776919.pdf
    • https://brothers-music.com/ckfinder/userfiles/files/fisuzojum.pdf
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/jexajoradadeku.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c71d058ec15---37860490821.pdf
    • http://poney-club-romilly-aigre28.fr/userfiles/file/mabelukugojosexijavine.pdf
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/evqbgukgospkjo920c3ipq3gfa/45407485672.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=what+is+an+example+of+transformational+leadership
    • http://e1pl2.nazwa.pl/busy/fotki/file/sasofivalesuwiga.pdf
    • 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_off0000df40.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF40 16792 bytes
font_01_sfnt_off0000f752.bin
a4169dbda6d09a17a02f3ddf4c047ff988bba24daa9b984c61d94f6893e7a6e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF752 15740 bytes
font_02_sfnt_off00011fae.bin
600a10f63328daa9589903f8151978e2d47d871c87a2baafa60b4a61de27d92f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAE 10860 bytes