Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c6c5f201f6f1cb…

MALICIOUS

PDF

98.7 KB Created: 2021-08-14 05:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 89bc85fc36f8150d3ae7a2974c8ac445 SHA-1: 2c319042f70c5369811f67cc6e83fca44ed11d7f SHA-256: 96c6c5f201f6f1cbf3496317549e224130bc7b66b53b1848061c000657ab4501
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the nature of the heuristics indicate an attempt to distribute or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9690

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://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/d60be2c9826e83410fb366aa6fc16b80/46059892147.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/1492510f4444bc153cb67dafad2b189a/dizikowej.pdf
    • http://artetendasud.it/userfiles/files/88911076866.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/fc11a862e76327f818851762658a175b/nuwepodubuxaxuwam.pdf
    • http://industrialdevices.in/uploads/nuwalemowapojaxipuw.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814c4a8a6e9---33629260361.pdf
    • https://newsru.md/upload/userfiles/files/58417898890.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/8f41f7fa940cb6c25ccdea99e20dbe91/45644015999.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b685c6e2930---diboveporafavosakaboja.pdf
    • http://ndt-ultratech.com/files/33351766505.pdf
    • https://radekslodkiewicz.pl/files/file/lamopov.pdf
    • http://area5srl.it/file/fawaganevebegudifanitida.pdf
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dbf4ed19c6---xexadig.pdf
    • https://bluetact.com/ckfinder/userfiles/files/xaninakorexa.pdf
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/b94ee74e2efdc338a4bb5074c85c5d65/vexulal.pdf
    • https://contabil-fiscal.ro/mm/file/fofulejazepi.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/d3f276784b33ce1d742606ab7d6313d3/9363074535.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160f2ad4067847---47843030329.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/c7bb0dc28cfbd24f5293e95fd0037529/fodakugukabakugosenaj.pdf
    • https://krassimirtaskov.com/userfiles/files/nimipaparamoweketef.pdf
    • http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/worenowolumewufitomaz.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/868q2lf2106gkgrl7cpni8p1pi/35548783332.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c94a4b58c68---49541790819.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4991df9bd---86902623366.pdf
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/kefumowokipuxes.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=download+game+three+kingdoms+conqueror+mod+apk
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/07df840106bfe6c3b2c8d007459ebd18/sedojedidusabukaxuzirese.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa6e.bin
6901138c3af066b350806e2b08ea0f19f42d7889a5b101633ded31ebbc0a5201
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6E 1796 bytes
font_01_sfnt_off000102db.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x102DB 16792 bytes
font_02_sfnt_off00011aec.bin
fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEC 16164 bytes
font_03_sfnt_off00013063.bin
e002527b8fe657b324873921851df00dbb21277e16f05fbdf5e8e39e1d5dc6da
pdf-font-stream PDF embedded font (sfnt) at offset 0x13063 11388 bytes
font_04_sfnt_off00014a8c.bin
a056ffb39cf347134c34f7fcd4b371a11be839b164eabb529d278451a9dd9238
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A8C 17640 bytes