Malicious PDF — malware analysis report

Static analysis result for SHA-256 56eacb0d7f0ec944…

MALICIOUS

PDF

81.8 KB Created: 2021-06-27 07:09:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8aa4ae1d7810d3acba5b4dce7de914c0 SHA-1: c89f5e63790251cb95508bfc4ec16d04c6915fce SHA-256: 56eacb0d7f0ec944914f37e6d5f372fabc6b13aa3e5b309a04fd8aef619811d3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs and link farm heuristics, indicating its primary purpose is to redirect users to potentially malicious websites. ClamAV detection and ML classification confirm its malicious nature, flagging it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://laborke.ru/uplcv?utm_term=g31+motherboard+supported+processor
    • https://cochleartudaskozpont.hu/files/rivejet.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7e0b68b3e---1565503164.pdf
    • http://slbreakingnews.com/ckfinder/userfiles/files/66756094595.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ab96affb2c073247fd1b8f87ad3913f0/24821456844.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3d9a4c8a4---gunosatatawusu.pdf
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/1pvp8mh2ttskodt96h8rqjbsep/18573235602.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbfb97af9f---vodexelapunevanafuviw.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b9fc940ed19---jigudib.pdf
    • https://audreyheselmans.com/_files/file/25033332749.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb54e8080f---85149722125.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/226e5d8d2dea68ff17654820743b46c0/noxibunosedozalazi.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ca53c9e17---wawekipinerigivekaguvoli.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/6550d9322a0bcaad13d243b48b6f6980/gosilotunikifaguz.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16072c9a611b9e---2922991426.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/9e841251rnc2g2ushrdefo4hpc/7687574812.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/6387ebfa11ccca1504c2f04b5528cd60/segifijusebajurek.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/12224176a0e14331659d2429bcd1d540/57987177969.pdf
    • https://africanresearchcenter.com/userfiles/file/radefavubevezuletijobube.pdf
    • http://imhkayseri.com/resimler/files/vumesuzexuwabuziwa.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/ttq6dmftso98ma002mtk7nrqvc/lagetomuwugusok.pdf
    • http://ud2-140.com/files/tofidekezop.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/pmuh57jl8vbqg560ogenr5mv83/13663707409.pdf
    • http://precedent.by/_newsite/images_from_html_editor/file/29953731598.pdf
    • https://hizlipin.com/calisma2/files/uploads/91027831259.pdf
    • http://sy-smile.com/upload/files/1758477679.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_off0000d9fc.bin
131c6b384213af9618386c6f997236ae7396f9817ce3c89ae65714de1069d93e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FC 11040 bytes
font_01_sfnt_off0000f396.bin
a640b9b03f9deec9a5f779b2300148a1957bc292b36982fee223f5afed895017
pdf-font-stream PDF embedded font (sfnt) at offset 0xF396 17552 bytes
font_02_sfnt_off00012183.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12183 16792 bytes