Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94c1f1f7c9ae385…

MALICIOUS

PDF

73.3 KB Created: 2021-09-04 19:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: e69b2816c9e62d702957f6845c7887f3 SHA-1: 4178feb6626f2d32f880a29e385b1588b9082231 SHA-256: c94c1f1f7c9ae385990925cf8e2951f5f2a0621ca5da58f838a56923529c725f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution attempt. The embedded URLs are likely used to redirect the user to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://synerhu.ru/uplcv?utm_term=the+warsaw+convention+pdf PDF link annotation
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/25d137dfdd14eacddead57f201fc7a1a/7416262230.pdfIn PDF document text
    • http://solsethreunion.com/clients/f/f5/f56c6d7ba488b74ef40bd02d3fc4d0b2/File/paparovevivuguveluxod.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/4243dda7ab157a031d65f894635b5574/15265400496.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e5e4b7b10---71124020911.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/n6uqfp2r5kuk4offstofe6p724/malexokaromunu.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/giserefemomolokof.pdfIn PDF document text
    • https://dolaodong.com/userfiles/file/balolezojopiwana.pdfIn PDF document text
    • http://huntland.hu/upload/file/xixumazemogifowodafun.pdfIn PDF document text
    • https://gemma.lucien-sv.info/uploads/files/612b0d86cea81.pdfIn PDF document text
    • https://slide-bearing.com/d/files/doxamesidudijemoj.pdfIn PDF document text
    • http://epicridesnepal.com/files/gufikek.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/dde7da4df6f8f5813189d26f019df184/24236425127.pdfIn PDF document text
    • http://datev.hu/ckfinder/userfiles/files/39125081191.pdfIn PDF document text
    • https://eltechma.com/zdjecia/fck/file/sefifajopoluwalanoxufux.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/guui77cts1j2csvr4jmtp47un6/83846818155.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/54409594570.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/95589164028.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/29190723135.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/42460069338.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/lilenifuzuzu.pdfIn PDF document text
    • http://uctodane.cz/UserFiles/File/bexeliw.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/54419676071.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611bbd1116f7d---xewaguduraxoli.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_off0000bd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD12 10788 bytes
SHA-256: ed97664abe48de7a4d4727a7ab456330dfb6cc1cc3b5eb727c68d544a23b8616
font_01_sfnt_off0000d5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F7 16348 bytes
SHA-256: 9a6a7dab356538fcf5c7b1ea9866d43843857c27014e2c9d08fadc28d7d1cc4e
font_02_sfnt_off0000fff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1