Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ae042d844cf5c7…

MALICIOUS

PDF

81.3 KB Created: 2021-09-24 01:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1d254201b78eb94bf9ef254660c54232 SHA-1: 048fec72e2ccab8b1934aa973bfd7a4b5fd92a38 SHA-256: 00ae042d844cf5c7e5c9dd1300d1d95904c91424ed7d84affd4aceb954bec1cc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm on disposable hosting, likely to distribute malware or conduct phishing attacks. No scripts were extracted, but the presence of external URIs and the link farm structure strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://allytemp.ru/uplcv?utm_term=plant+vs+zombie+offline+pc PDF link annotation
    • http://geombiagioschettino.eu/userfiles/files/87555217804.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/gawexolateb.pdfIn PDF document text
    • http://dezmaster.com/userfiles/file/47845935213.pdfIn PDF document text
    • https://ruta.hu/ckfinder/userfiles/files/muxizesovu.pdfIn PDF document text
    • http://ichieh.tw/uploads/files/202109070227351386.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/20219510113048.pdfIn PDF document text
    • https://alicantea.centralcms.cloud/galeria/files/10457701137.pdfIn PDF document text
    • http://nawoo.net/userData/board/file/72631688509.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148dfdee741f---94134941538.pdfIn PDF document text
    • http://111-orte.com/testarea/cwsCMSlight/media/files/9546219526.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/jd4kaq68iho24vl2i86hq692t5/89915578182.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/cde38984218e1d8950e5da33eca36ac3/45814953245.pdfIn PDF document text
    • https://schmitz.cz/res/file/10344806895.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/44268345207.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/31214354098.pdfIn PDF document text
    • http://globalroomplus.com/bot/ckfinder/uf/files/loranejanigadofupivuvi.pdfIn PDF document text
    • http://geose.ru/userfiles/file/pulapelugi.pdfIn PDF document text
    • https://ubranni.com/uploader/files/59143718120.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613d182e37777---10002924583.pdfIn PDF document text
    • https://sydneystudytour.com/accounting/userfiles/file/36851621682.pdfIn PDF document text
    • http://theprofitnesstrainers.com/userfiles/file/90164569661.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202109221643035059.pdfIn PDF document text
    • http://kco.su/userfiles/file/65880346923.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/refozexe.pdfIn PDF document text
    • 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_off0000d945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD945 10808 bytes
SHA-256: 4b2250d96be263d72c66b7df60ec80265968a6f68dd75ec8d00d6ea114172a60
font_01_sfnt_off0000f20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20D 17416 bytes
SHA-256: 148f6d9657c927d53d47355c5a86f4c41be900190943c84de4ac54b8274dfc9b
font_02_sfnt_off00011f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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