Malicious PDF — malware analysis report

Static analysis result for SHA-256 470f05fbb4b81bf1…

MALICIOUS

PDF

116.2 KB Created: 2021-06-30 19:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 966bc34d6d0a233b9e6a4bc6a3715abe SHA-1: 39bb9af7bd1bc6b7c8dbb1e35bffc7762408d29e SHA-256: 470f05fbb4b81bf1aa689b4b56bf28ced94a7b44ac39905d627eaf6f30a97822
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as containing a link farm pointing to compromised websites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous external links suggests it is designed to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/32dft6bocvssvb1k0hgni4e852/javuz.pdf
    • http://lycee-elm.org/userfiles/file/viguguvekudoduw.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6c7b40dd4---21538025851.pdf
    • http://domholidays.com/userfiles/file/45325963002.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b13e29d68---32578096751.pdf
    • http://bahsclassof1965.com/clients/1/1d/1db829f64c2e26d3b32b12ccabba4d7c/File/mugejifusogaw.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7b34294c5---59787716029.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/6b0a27da8bf3dc58fa3e16b29449c06b/45835598359.pdf
    • http://hotechike.com/files/files/4061910965.pdf
    • http://trans-serwis.com/userfiles/file/doxomofutomip.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/k0lai9qvo7fsibt15jl42lehe2/84369575971.pdf
    • http://toyotarent.kr/FileData/ckfinder/files/20210611_071AB351B5AFEB3C.pdf
    • http://rauvuonsach.com/images/uploads/files/44845965838.pdf
    • http://drairtools.com/ckfinder/userfiles/files/64364336323.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/pg3vg89dvqbp0qgerdv5oqmjqs/wefimamabo.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/fpe77bj4f5rejmgq77ahvqskla/58154912777.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5d72d7a59---55682526679.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/6cfef657bb4d8e6f39b54a79fdf22336/64495782024.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e00dc18015---88131766425.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720fc9cffcd---lefozatebir.pdf
    • https://medtek.vn/storage/file/69939841340.pdf
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92032167061.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6d784f22c3---riberesakibejuvemiju.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=wife+tries+threesome
    • 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_off0001695f.bin
f0e2ddf3b3ca4c649b1e50fb5b5732b8c7e0d9f240e95cf789467845563ed0e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1695F 16744 bytes
font_01_sfnt_off00019516.bin
4f495d85321567c5f2b8464f6de92fa1ecbf459184e3016112f8bb05a2419614
pdf-font-stream PDF embedded font (sfnt) at offset 0x19516 10160 bytes
font_02_sfnt_off0001abdf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1ABDF 16792 bytes