Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe012e85d15dad6…

MALICIOUS

PDF

82.0 KB Created: 2021-09-23 00:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5f72a175dd3d5731fa0e73151f5478b8 SHA-1: 24ed4682d2b70df90129e9524c3abbdecd34c730 SHA-256: afe012e85d15dad6f1d4afd93fe130eb7f9f5bec648603cb5a98cea44ebbd98e
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. The document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://feynburg-uhren.de/uploads/94828710781.pdf In PDF document text
    • https://mudraconsultancy.com/uploads/files/77824236277.pdfIn PDF document text
    • http://sushistoryus.com/uploads/files/25759697378.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/jaxesopeketiromofiwo.pdfIn PDF document text
    • http://agecarekorea.com/ckupload/files/vanabej.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/nufilusejomo.pdfIn PDF document text
    • http://kooijobs.in/ckfinder/userfiles/files/vozisadojiruxizokif.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/03d2ce0e17cab2f21f745d40c9def22b/83432875805.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/bd6086423a18198056f012666bad3d2c/72077437375.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/zitabedizanuxelijaluv.pdfIn PDF document text
    • https://u15.ch/ckfinder/userfiles/files/75040223667.pdfIn PDF document text
    • http://paramountswimwear.com/userfiles/files/28366359470.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/99880865589.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/cdace8a3a98f3bcab7d45493aba8d4c5/32469270999.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/bekesolube.pdfIn PDF document text
    • http://grafosaleservice.cz/images/fck_editor/file/widapojigoteg.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/gomunivazij.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/27684535391.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/tadeboluxonazogawunoxar.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data/files/futuvekavosero.pdfIn PDF document text
    • http://platcometals.com/images/file/zeloxenirolaferumivadop.pdfIn PDF document text
    • http://phuclocvienjsc.com/uploads/image/files/71557388618.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/89296093450.pdfIn PDF document text
    • http://ilksolar.com/Images/Media/files/54925407300.pdfIn PDF document text
    • https://alev.az/userfiles/file/tetanoxoxolo.pdfIn PDF document text
    • https://hsse.cl/files/41640823944.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+find+a+lost+or+stolen+android+phonePDF 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_off0000db8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8C 17692 bytes
SHA-256: 2c175ade96a124a95312f4fd7e552d84c149b3ce177ff443a232177ac7170834
font_01_sfnt_off00010939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10939 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12150 10672 bytes
SHA-256: 834752d42e0b1cd52d48a5fc42ae903d00ec71e9dd62b26d2efa43745c8d9130