Malicious PDF — malware analysis report

Static analysis result for SHA-256 860e0b2ba2ed3f1b…

MALICIOUS

PDF

77.2 KB Created: 2021-09-02 06:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e64aa9ec3226e2f005a8fb2b4382a4ac SHA-1: cc26ebf6bd8c8cdc6429e2bbc9e01397586ed6e2 SHA-256: 860e0b2ba2ed3f1b9f8b2f7a2cbf6213ca0b8a3e786f671daa0b19cdaccf073c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised WordPress sites. The presence of multiple external URIs and the nature of the hosting suggest an attempt to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://cructi.ru/uplcv?utm_term=a+star+born+streaming PDF link annotation
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/a6281027bcc034d19b597e0cc1e473b1/jurawolixijuterotatuku.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/inn7r9s0nefc2ht7qc1cgg8a93/kigetito.pdfIn PDF document text
    • http://srtprogetti.eu/userfiles/files/50794839668.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d28643b4210---45308359141.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/74561852468.pdfIn PDF document text
    • http://techbis.pl/files/file/63495492498.pdfIn PDF document text
    • https://a-pointpro.com/cms/ckfinder/userfiles/files/82885729281.pdfIn PDF document text
    • https://rumputhijau.com/contents//files/zexilovanezozidimipe.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9871d4606---67467289133.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/afeca6b9c279beee9d20f8676e032cb1/nabagojajobi.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/cv0bqku7j55bnl907fgbcn2a1g/raminubonutevi.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/56c06354620d9384d947b31665e3c1bc/91842970044.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/073af39ba173a6004ccb5226ed42423c/ruxegex.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160babdf00d06c---86522191746.pdfIn PDF document text
    • https://italvaping.com/file/wevenodisedemodixew.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/bujabetifefijar.pdfIn PDF document text
    • http://qzgj.cn/upload/file/xubibi.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/373dbc99043da1b1dae88ba24d5a9a79/gotirarotiwarazokesevit.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/75669335329.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/87747b3ca56a94f74ccb80779801169d/40872719989.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609906de65730---8658348630.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/f3c1f8318046520edced37edfaccfc81/6926134888.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/irvgfij1c41tcnr7v2eh3iskb3/mibilok.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/61510458760.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00D 10528 bytes
SHA-256: fdea02bc88d0433dd5203ecde77b1b976859bce108d9bf21e3db79516f370246
font_02_sfnt_off0000f80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80F 17436 bytes
SHA-256: 1863cc66c04959c70eda387638fec7c4b3dbe9e7a17737efe31917306d306844

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