Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2698aaa0ef4f7be…

MALICIOUS

PDF

74.6 KB Created: 2021-08-04 01:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 72567fe04ec7a67ec6c481ee79b042c5 SHA-1: f46cdb2368a7a50e025b8258fad2c4b17ced20a2 SHA-256: b2698aaa0ef4f7be174b728e943a8d8a9ab5ba7711fa6a0847dd04b5043bb599
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits vulnerabilities or serves as a phishing lure. The presence of numerous links pointing to compromised WordPress sites and other PDF files suggests a link farm designed to redirect users to malicious content, potentially for further exploitation or credential harvesting. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/kqu6i6lqdu32cp2s5u8neoh0kh/difotemifovanakizow.pdf In PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c364e738d---61573608239.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/60464435644.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/82716347822.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fb1d50dc62d---73149003888.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb466b1e0aa---gawem.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/63769546701.pdfIn PDF document text
    • http://allycatering.com/userfiles/wolowodujifaza.pdfIn PDF document text
    • http://bhhangkhong.com/upload/images/files/94897338304.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c0919f70c73---75043253974.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/liluxevolebulorusewisoreb.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/9c9625874b01fcb8473bd4ec63c897a3/35176673936.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/jinofeduxonojubonuzot.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/72937531746.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b602a7921c4---8037149688.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/a9861udhaquqd1uhf280g0j7d9/30246662422.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6b24b9851---tavorefipobibesew.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/a5fe877de8c1f64c338b9273f0cb3d29/sezegedojekekusixorojeko.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/notopafarefoxudenitunebuz.pdfIn PDF document text
    • http://stewartreunion2020.com/clients/2/2a/2a0d9dcdd57715375c9f4393c24df0f2/File/80543273574.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/ab2688bbde0a8953323810a51f37ba74/41216382049.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+pair+a+microsoft+wireless+keyboard+800PDF 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_off0000bf6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF6C 11432 bytes
SHA-256: da607d345ca69b4df8e804c5bcd88213d3a2b7fc01e7bd6d588e7de325fb947a
font_01_sfnt_off0000da42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA42 15872 bytes
SHA-256: b27b5c39cea59880a795056206b68191959d3371404ef826f7ca6ba71f8299b1
font_02_sfnt_off000102ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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