Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab777d2f266d3047…

MALICIOUS

PDF

73.0 KB Created: 2021-09-02 04:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6ef6acca3a399bc769ae3a9899f01640 SHA-1: 5612202369c0c87f3872cafed5198165ce04897a SHA-256: ab777d2f266d30479bbcbe2f8e96652f62ae97da821179bd87ecab23a46fbf8d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to various domains, with one URL specifically identified as `https://pixomot.ru/uplcv?utm_term=sims+2+no+dvd+patch`. The presence of a link farm on potentially compromised CMS uploads suggests an attempt to distribute malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://pixomot.ru/uplcv?utm_term=sims+2+no+dvd+patch PDF link annotation
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/8d40d737a6b7aa015019e3a5269cf04f/rolubebifa.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a58dc530505---1069549845.pdfIn PDF document text
    • https://pasarantogel.com/contents//files/tomuzuvixexewezusel.pdfIn PDF document text
    • http://draftingfloorplan.com/ckfinder/userfiles/files/judifagogapavaxagetu.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/vagorodetu.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/kusorakabaxoparafinex.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/3b8e8b1660e88297ae3b61df81996c11/podusesoluremages.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/b2c028f84766e39a615e1729f2070793/92656992709.pdfIn PDF document text
    • http://wx-test.com/upload/ckimg/files/202108160004349245.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079761054907---79267152614.pdfIn PDF document text
    • http://hk-sai.com/ckfinder/userfiles/files/mukofize.pdfIn PDF document text
    • http://web300k.com/upload/ck/files/14361222755.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/wixabumamorovuzobinejo.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/374f1b0f0618e41afd6be1ca1f67fb69/falawefeduwaloze.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/binatixofojiwawa.pdfIn PDF document text
    • http://needychild.org/ckfinder/userfiles/files/vimemudefalojuxox.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/6f7b3f6459870fa0d7dfdb77ea459864/fegegasa.pdfIn PDF document text
    • http://1975geegees.com/clients/78603/File/xafoligidewi.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/kexiperidevabobaxiziz.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/25419483290.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/vowenavajuluvuza.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078de5100c97---89085346988.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/70d1701e539da46ccfad37446e9ce481/dinolubusa.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_off0000b9b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CA 17092 bytes
SHA-256: d2551ef14cab99d3ff0bd072fff94bca0f0e849c40c1facbde85db286b6132fa
font_02_sfnt_off0000fe21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE21 10764 bytes
SHA-256: 130bb45d95fa4c5748b4c2f5df78617dc91ecefbfe221aa55463ea5d5ac1038b