Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ead7ebea72b4c2…

MALICIOUS

PDF

71.8 KB Created: 2021-09-20 14:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e7a9afb332f2b648bb35a53ea3d0e56e SHA-1: 1dc78e2ca37e9711a5a5301df92d159c8af16a06 SHA-256: c1ead7ebea72b4c286dad533e9be099f79e299d383225df43dc31f12ffadf752
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO spam. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://ozanetiket.com/TasarimAcarnet/serhali/upload/files/zafadazipegawor.pdf In PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/rifeboxulolekodog.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140655c75a20---76148461289.pdfIn PDF document text
    • http://rentator.com/uploades/fckeditorfile/gixufamufazeruwe.pdfIn PDF document text
    • http://hastensandbreakfast.nl/userfiles/file/lijanelofiwokusupivurubi.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/vosuzoworinorufakagatexo.pdfIn PDF document text
    • http://numismatika-nbkpdy.cz/userfiles/file/47913137854.pdfIn PDF document text
    • http://alltechsro.cz/files/fowawonajex.pdfIn PDF document text
    • https://pilot-nav.socksnbows.com/ckfinder/userfiles/files/52813845270.pdfIn PDF document text
    • http://blueview.nl/app/webroot/files/userfiles/files/vizusi.pdfIn PDF document text
    • http://ipayon.com/root/FCKeditor/file/63486829316.pdfIn PDF document text
    • http://usmleworkout.com/files/file/7082018195.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d5223d74b---juxaf.pdfIn PDF document text
    • http://pronobile.com/catalog/file/65050481914.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/98cc39cff6456acee63a40e54d3bd6c1/50276884490.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/tasidagadiluz.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613af781692e2---8479612893.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/737b2318cc2d2596026c3fcc8185b739/11822855672.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/napalivumumipemizewarixuz.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148385bcbab2---sajejefefokonebu.pdfIn PDF document text
    • https://csmgh.net/pevron/www/img/file/takijuxuteginixiwozemi.pdfIn PDF document text
    • http://carbonelite.ru/file/rororuvok.pdfIn PDF document text
    • http://soupworld.de/upload/file/17193469005.pdfIn PDF document text
    • http://noithatdangcap.vn/app/webroot/uploads/files/29849685140.pdfIn PDF document text
    • http://thebodyclubonline.com/userfiles/file/91377196649.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=devil+may+cry+3+apk+free+downloadPDF link annotation
    • 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_off0000b38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB38F 17164 bytes
SHA-256: b1d342ff81268e87553cb31865854d08ef5ebea5b2edc14114b911121a3d9b12
font_01_sfnt_off0000dfdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDC 11048 bytes
SHA-256: 0db1cfc7dfaf438b1739041e30ad1600c0c20a1148bb2b10d390970a6aca33bb
font_02_sfnt_off0000f9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1