Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be045187d54bc6f…

MALICIOUS

PDF

95.6 KB Created: 2021-06-29 04:42:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e0e1f758349fc15e5ee3aec14d212a47 SHA-1: 6d4abf2dde2971a805518a176498e89c30a1c45f SHA-256: 9be045187d54bc6f7ddc0c8c97913758a3eb05b5718193e50ab883abcbb41e8c
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites. The ML classifier and ClamAV both flagged this file as malicious, with ClamAV specifically identifying it as a phishing trojan. The presence of numerous links on disposable or compromised hosting suggests an attempt to lure users to malicious sites for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/214c08e2f58b096f4cebd578eb840957/95890801669.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e484a462f---28999947890.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/da5e69685cd66793832f16cd8b6e5278/selimijakeveferivebukozow.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c840c69968---17229241046.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1541ccb4f---xejogelizogoriv.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/c2b80608da1928f8359dca4374964443/doruvavujalamemizu.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f47cc2987c---69113466274.pdf
    • http://beytarimcilik.com/admin/editor_resim/file/13512509113.pdf
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790010da59b---57357822600.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b011d7b39---wojilegowo.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/nrh5ocvoicg7t8v7j1pvg9fsu8/pasusobezam.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c11385ef975---30077621845.pdf
    • https://b2cexpressdemo.com/userfiles/file/26987462439.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe7fb14cc2---72996411221.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a240e7b56---widosuse.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85d05ac325---65159897078.pdf
    • https://nabsangram.com/userfiles/file/dimimi.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608286e8d2b2d---fozunowa.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/a33f38fecb5e6fe01062b25d6e540b79/51704768270.pdf
    • http://penzionklara.cz/userfiles/file/ridabiferisalorome.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=effective+intermittent+fasting
    • 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_off00011321.bin
d74bd2482c98951dfce387275d9995c27b3a027c24b8a2fff24a4a3564a39938
pdf-font-stream PDF embedded font (sfnt) at offset 0x11321 10560 bytes
font_01_sfnt_off00012b39.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B39 16792 bytes
font_02_sfnt_off0001434b.bin
4ad9781b3230d5ae791c5b9548bea258f20488c95ee5a920bcd5a9d63863866b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1434B 17696 bytes