Malicious PDF — malware analysis report

Static analysis result for SHA-256 f60a11f4570b5060…

MALICIOUS

PDF

81.7 KB Created: 2021-08-18 08:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e7e6cac7b792b18b8bd9d3c0c6fbd3e3 SHA-1: 8ac30c04eb5e326b92cc407d839a7a2d6c82497f SHA-256: f60a11f4570b5060c3a2ffff7d51663bad78a9e570fb0c403185fd258e0f72ef
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites used for hosting malicious files. The 'SE_INVOICE_LURE' heuristic indicates a phishing attempt, likely to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://philabc.ru/uplcv?utm_term=how+to+decrease+leverage
    • https://sofupingame.com/calisma2/files/uploads/17568978982.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608a99c7a81e3---sugewone.pdf
    • http://stlukesmn.org/clients/17773/File/vuwuximidep.pdf
    • http://asbufestival.com/uploads/FCK_files/file/dikezupatagudavefeji.pdf
    • http://thecreditcrisis.net/clients/73966/File/jigososixusiravuga.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2511bde13---zizegufivipetukifesawit.pdf
    • http://turagent007.ru/userfiles/file/58122175863.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16090f44360799---sipadepawexuzugavim.pdf
    • http://apple888.vn/luutru/files/xotukoz.pdf
    • http://sictombbi.fr/ckfinder/userfiles/files/82078882877.pdf
    • http://vankouwenenmastop.nl/UserFiles/file/69118058841.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16073d41d91a68---pevavidapogubuwupej.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/56334708829.pdf
    • http://www.ecostroyservis.ru/File/4002192738.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/87f46657ff7eaaff097e81fb98fcfeab/98520178272.pdf
    • https://manajrgvaaradhi.com/cms-uploads/files/lewoke.pdf
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/pivemimesuxos.pdf
    • http://joyear.com/ckfinder/userfiles/files/tibukelafurag.pdf
    • http://barbusci.it/maisUserFile/file/sasaxadatililulumuzosu.pdf
    • https://acavacecio.it/userfiles/files/lozoref.pdf
    • http://nccutrackandfieldalumniandfriends.com/clients/2/2c/2cea5a7e730406ee40dfbbde6098010c/File/19829526569.pdf
    • http://matsusushionline.com/uploads/files/pivasoxenesimiponorezor.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16075dcaac20bf---82241331894.pdf
    • http://sevimticaret.net/userfiles/file/kiwev.pdf
    • http://chi-kara.net/userfiles/file/19502027437.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_off0000dd28.bin
7d9dfbc9ea7a2ad6290cff9fed15def2fb68ca5cc65ec442a6b3d8d4a5b11ea9
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD28 10492 bytes
font_01_sfnt_off0000f4f6.bin
171c160f37f53279d8a34e87eb22d5b2bff3e6e2ff05a8193481afd2fcd686dc
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F6 16584 bytes
font_02_sfnt_off00012025.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12025 16792 bytes