Malicious PDF — malware analysis report

Static analysis result for SHA-256 2306ccf173b2a7d4…

MALICIOUS

PDF

85.2 KB Created: 2021-07-04 04:34:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7b35167d91e4e0e1cfcc55fb73fcd98a SHA-1: 1e2b80eae99cc3269c4be516fe39bdb9d6e9b4af SHA-256: 2306ccf173b2a7d4418c16e4c5f348b54a809e22665ad604df78b747946dc88b
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised CMS platforms. This suggests the document is designed to lure users to malicious sites, likely for phishing or to download further malware. The ClamAV detection and ML classifier strongly indicate malicious intent.

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://tokyoracing.hu/userfiles/file/pazogakirebewoj.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c44f62972---60707573529.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/be74f75f0c4aacdfb7233a731232e04a/netepivawusosowinexivarox.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607859f7a61fc---mikok.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160717f2a8d005---wusuperu.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/9b228c6d5db528708355511f17dfdac7/jakimodukukoropusuzas.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/4fedmok1f41g0cjl9l832l31m5/56997061756.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/3canviq1u1v3ocgeqt0ekpdmro/nugeroxar.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c5233cb6592---89559730220.pdf
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/54741a9f6c033d147db89362788f900f/51732208004.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd26b7af7d---40297092219.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da995e0cb3---32619680602.pdf
    • http://automotiveenergy.cz/userfiles/file/55829422049.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42944e0e62---81076790033.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928a2c28c17---66186612335.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2ff85462f9---44828889780.pdf
    • http://caramelitos.sk/files/manukefatosoterigebafuziv.pdf
    • http://biosite.ru/images/news/file/32739736336.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084df221be7c---49529086641.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d182dd88b0---jidekigewijilenawuzul.pdf
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/wukepebimaxivume.pdf
    • http://adance0112.com/upfile/editor/file/10538760937.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/c4eb47db3d9cc0e9250522fcd5f0f0bd/78222079844.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/31e902d9c32f73cce1666be752e668f0/72523775319.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/8f377cf61faf5c57deb6b37d098c9bdc/nejipitizitewawepikijakug.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=metes+and+bounds+survey
    • 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_off0000e8e6.bin
d7a10b8ce0de59850762db26525011da93dba6ee6e969db6e09624823a0fb3cb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E6 10516 bytes
font_01_sfnt_off00010108.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10108 16792 bytes
font_02_sfnt_off0001191a.bin
e35453a5626170227d20a4600eb7da8bf122193e289c5f43cdb7e3d27f5063c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1191A 17748 bytes