Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6602c29ebbdeae6…

MALICIOUS

PDF

86.4 KB Created: 2021-09-06 23:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d7580447c8051aa5329808ba79e76010 SHA-1: b5ab402238a3b408cc19bea827ec94a99169527c SHA-256: d6602c29ebbdeae62fd7e3fa87c4ca2062481bcdc6d0d11219af1046c0b06ee6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing to multiple compromised WordPress sites and disposable hosting, indicative of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 https://needlugs.com/userfiles/files/fulapakamoneremuzu.pdf In PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/0bd4e1f4875724eb23f776e7fa1e305e/45827698291.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/51891645126.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160855193e8ec1---12312285065.pdfIn PDF document text
    • http://choragwica.pl/userfiles/file/28966557536.pdfIn PDF document text
    • http://srsheicha.com/uploadfile/file/85230529434.pdfIn PDF document text
    • http://slabowidzacy.smprzemysl.pl/ckfinder/userfiles/files/34989843101.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0be7fecfca---99972889870.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/70635507571.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/fawar.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/tadapuxipixewibipi.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160940c1584a41---93246532915.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/405631e2f256bc88553bd0612b97d491/80079845758.pdfIn PDF document text
    • http://ntep2008.com/UserFiles/File/19690874044.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607759705b80a---18364852915.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/19231734067.pdfIn PDF document text
    • http://numismatika-nbkpdy.cz/userfiles/file/xonuxegopesisemonu.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072cf16ce207---27257721574.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/xijazamubixawopapare.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/fozopedidakovoka.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/78db67f2d5c8b37a90de15f2220efed6/pakomijomesebavazefuwi.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf7f81c3c4---solukuviduvasezu.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/45966844840.pdfIn PDF document text
    • https://tgvl.in/uploads/fck/files/timuxudipipusiniseburigab.pdfIn PDF document text
    • https://cvconstructionsgoa.com/pharma/admin/userfiles/file/senoladifagafibonezelin.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/0gd1nu2v90q11bkl2bj9gknn9m/56073934286.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=amazon+web+services+in+action+pdf+downloadPDF 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_off0000ea27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA27 18252 bytes
SHA-256: 041466fe32a4ea2dc56a6aff4973f95084fa7b9a5f775baed98ed269bcbfc067
font_01_sfnt_off000119fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FA 11112 bytes
SHA-256: 810bbae516e67f8ffbaf556fe2ea422ecc750e94a669fd4076b8ce09d188d283
font_02_sfnt_off000133cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1