Malicious PDF — malware analysis report

Static analysis result for SHA-256 452b03e34bf65032…

MALICIOUS

PDF

67.8 KB Created: 2021-09-10 11:21:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: ef0d6ce5dabc3428c38e0c156745f2f1 SHA-1: d56d47f391f334ba765ffa0e75a1922335476f4a SHA-256: 452b03e34bf6503275e3342166c0da0db03112239e919a83827071f4662e40ef
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4355

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://tecnoservizi.com/userfiles/files/toruwigosuweredenew.pdf In PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/nunodazuvexexu.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/92643528225.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161346c6179e72---60431566073.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/36494572783.pdfIn PDF document text
    • http://biondiairsystem.it/userfiles/files/38634284513.pdfIn PDF document text
    • http://abpjse.news-read.com/upload/files/36686110372.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139fa816923f---jatowixakajanezava.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/53a63da6abea3e5132055aa38ddebb91/16283369873.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/misujuvorefanad.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/xefokojitiwat.pdfIn PDF document text
    • https://www.milestonesmn.org/ckfinder/userfiles/files/fomokigote.pdfIn PDF document text
    • https://tttinox.com/upload/userfiles/files/45974178426.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/54010212157.pdfIn PDF document text
    • http://marinaxaraes.com.br/ckfinder/userfiles/files/59827994902.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613790d44d633---seguzozogirivazabasi.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/30957176843.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/nirugizisotebejibil.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/90b3199a63312ee5b4f1b88ba48c5b12/ligefiriwim.pdfIn PDF document text
    • http://koala-al.com/d/files/35063103896.pdfIn PDF document text
    • http://linker-apps.com/files/87745665016.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///pudunixelizokodozutin.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/kaledatixukugezur.pdfIn PDF document text
    • http://gmkms.net/upfile_editor/2021/files/gesupigobomobukasum.pdfIn PDF document text
    • https://www.l-games.jp/js/ckfinder/userfiles/files/8037332510.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=redmi+9+vs+redmi+9+prime+vs+redmi+note+9PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD571 16180 bytes
SHA-256: c0217721a1102ad1f8a8ff5461faadb02f26a3634bfe128d67f68b25b112ee8f
font_01_sfnt_off0000eb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1B 10624 bytes
SHA-256: 768ea198bc94b515d54455f768ebc5477f43537271511121841f51089edae0cd

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