Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d09482b310757c…

MALICIOUS

PDF

106.8 KB Created: 2021-07-09 15:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c9c6d28e0fbbbb544a4d52c0eacbee66 SHA-1: 060717b6e4cbc442a90a87e29bbdcc9fd9db6eb3 SHA-256: f2d09482b310757cdd22bacce0486986e22b8b13213d1854d9313b8507a9476f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content or phish users. The presence of external URIs and link farms indicates an attempt to redirect the user to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ed418fa2d---lemewumo.pdf
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44078961473.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa802eff9f---paferufiguxenenitiva.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9037034e5b---rixejadutoga.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095fc85f2d6c---84571258077.pdf
    • http://wildpflanzen-planung.de/file/34802716822.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16081151666a5e---91075382270.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607926c52b88f---xivuz.pdf
    • http://massageindex.nl/images/uploads/36208676730.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8be5c8b65---75565986340.pdf
    • http://hysansam.com/fckeditor/userfiles/image/vodexuzitikiniwu.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/3asojts9qim4t8n0vggmsjjl7d/57301664718.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca4874b10c---fepovidefemunexibed.pdf
    • http://costruzionibulagna.it/userfiles/files/47745371854.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/e9b58b83ad3ee54f9f2335c5c6a11a3a/letub.pdf
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/42029845833.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/16086c555557dc---xetegitenukenixukozufox.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/3fae25127e6d6bfe6dbb0f4bb90f2376/52057972519.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c00dc3ae66---52375107888.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/24e9bb46c1c92936d421d2796d01992f/88702504094.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/0843426ef51c0bc6245d5b7335859720/20672364440.pdf
    • https://hondamienbac.vn/userfiles/file/mutivabemepajobugeza.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=what+does+it+mean+when+you+yawn+after+someone
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bc126fae5---fenexigovogolikenufawiwiw.pdf
    • http://irodori.kir.jp/files/file/xolakivuvixopuguzur.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_off000138bb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x138BB 16792 bytes
font_01_sfnt_off000150d2.bin
912fe2100d123a7e3a2d17ccbd5c69affc6d367c06cc057bf97b922eb9cd24b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x150D2 10868 bytes
font_02_sfnt_off000169d1.bin
3be66c9b04f645737d100cf87fb0eeedc0f406a8d3fcfed5256d79357c110a69
pdf-font-stream PDF embedded font (sfnt) at offset 0x169D1 20280 bytes