Malicious PDF — malware analysis report

Static analysis result for SHA-256 6473f5e92c27a2b1…

MALICIOUS

PDF

62.3 KB Created: 2021-09-05 11:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0533c8c6cb0af123ecb599fc9a0da7c0 SHA-1: e2e7cc8d7eadcc72c157b2d02196a17725997afd SHA-256: 6473f5e92c27a2b1ac38969bb548c7fde8321d42cd268b3a74e29f4b3f2c7dda
174 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. The primary attack pattern involves luring the user to click on these links, which likely lead to further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9315

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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://n2nlah.org/UserFiles/file/69374544392.pdf In PDF document text
    • http://abwingsmd.com/uploads/files/posuwekepoxikak.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/11762ab5192d87f6d6b00c3b6bb5c620/87534208239.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/99215246393.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/o1t4ld2rf9s719i5l92hd5f1jf/tures.pdfIn PDF document text
    • http://itemclinicchina.com/ckupload/files/vufixatovolawitibul.pdfIn PDF document text
    • http://partnercable.hu/files/64758039194.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a572e70919---dabenu.pdfIn PDF document text
    • https://dragonexpressml.com/userfiles/files/27287389623.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/pipajivezixalere.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/34d81f8791825af500c401587f80be37/90334239645.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/f426ca9db845932e925b908ebdbdc11d/98565578618.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/161282e7d3a594---pibazowigalugif.pdfPDF link annotation
    • http://dochoiotovn.com/uploads/userfiles/file/21987865274.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/77914486010.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/iom9k8d4g1fate66ka153kodeb/senuzakatetuvakube.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/duwozenodufugo.pdfIn PDF document text
    • http://learningkey.org/userfiles/35206732264.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16080708a586c2---88300362585.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/duxemebirojibugodikunut.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/72fb352b0424fa9500f1d5cf92b21b60/betifiruwax.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0d1390fe4---32774837250.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a58fc154ef---57363785862.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdf1a8053a2---25939261315.pdfIn PDF document text
    • http://digifast.cz/userfiles/lanipezetax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=slight+edge+book+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE293 10548 bytes
SHA-256: 8c432f1367b0e9fdbaa09e9b8719ca0b1cfba3f12862a23e5f39b1b17acc6745