Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0474c85028ae87…

MALICIOUS

PDF

83.3 KB Created: 2021-09-03 05:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 28ff579b52c59b24f1e5ccd6829dd424 SHA-1: cedff6beeca10e4f889d69fee952ae97467ce37b SHA-256: 2e0474c85028ae8746f324921029c2654236b37143a40ba5a7b21472c00c148c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://studiotravenzolo.it/userfiles/files/wixetonisamoxudike.pdf In PDF document text
    • http://sport-way.ru/img/file/vojon.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/dosusunikuwuvunix.pdfIn PDF document text
    • http://vinmexindia.com/uploads/98791398773.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/61689321176.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/89578281109.pdfIn PDF document text
    • http://thetownsendfamily.net/clients/a/ab/ab79602242cca8f930cd52af13df1d51/File/27247381821.pdfIn PDF document text
    • https://etimes.mn/uploads/files/57317451267.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/4giagbh2mjejspkv82k3jfelgc/gaxemigatovelonitisi.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a039694930d---21878563212.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/30871009516.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/48e75456e662b3bce1e1781d60f90a2e/46004428597.pdfIn PDF document text
    • https://rumputhijau.com/contents//files/11747001528.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be9fa688494---71926954221.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/bomurumanagerekebesagi.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/c8057a36a2637b3769d1e9c8186dd666/gujizamofixajatefefo.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/mutifodamipedenamokan.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/jalewupotixufi.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/0ku45aj7v4pl8jm10l1sf41dr0/30066284444.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16128ea909ff4a---dowebuberipurivemaxi.pdfIn PDF document text
    • https://2acontractor.it/images/file/87678274744.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c344ef6bd20---lurerinekijerisipomumiguf.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/felisig.pdfIn PDF document text
    • http://agendaalzheimer.org/files/galeria/files/bowilituxowujujina.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c088e5e57c5---50317249011.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=n%C3%B4ng+nghi%E1%BB%87p+b%E1%BB%81n+v%E1%BB%AFng+pdfPDF 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_off0000d610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD610 10948 bytes
SHA-256: 437eb07e985fd1bc93c2d4ae172002b20eead2aa4179e7b57015233e6254c74e
font_01_sfnt_off0000ee9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9E 27712 bytes
SHA-256: 20d8e75bceeb41e4e58882965f4c8a182b99c9a488932f64900092a74afe1e37
font_02_sfnt_off00012528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12528 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1