Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e02e3e7a4641e09…

MALICIOUS

PDF

85.9 KB Created: 2021-09-11 11:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 293d8a78c06a139ff79df0fad662b11a SHA-1: 58b82c7a3bede298385a237c0300189e4b851321 SHA-256: 1e02e3e7a4641e09898bd8d2b5525ee2f888b2c3241b196cb6b782c1783af695
176 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains numerous links to external PDFs hosted on various websites, many of which appear to be compromised or disposable. The presence of a "link farm" and the use of compromised CMS upload storage suggest an attempt to distribute further malicious content or phish users. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://aromamahabaleshwar.com/ckfinder/userfiles/files/tonuzidoziru.pdf In PDF document text
    • http://rwdwebwebdesign.com/img-aim/files/66777933230.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/50556862199.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/e1fb8492bbfaef5cd46a557d9b2d56e6/xoletip.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131f7636451d---kasanogi.pdfIn PDF document text
    • https://tiemhoahaibara.com/data/dulieu/files/59436465695.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/gupilabefer.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613203a665a92---tufos.pdfIn PDF document text
    • http://nawoo.net/userData/board/file/pobakutiw.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b504b26ca1---subaxokowonetimejokese.pdfIn PDF document text
    • https://przygodanaukrainie.pl/admin/ckfinder/userfiles/files/63180129390.pdfIn PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/wijotutonosizidoz.pdfIn PDF document text
    • https://eguiders.com/uploads/10650655681.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161369f97a1a44---jukawonodesodazenozuzafi.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c31eb06a8---4857804921.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/91605122291.pdfIn PDF document text
    • http://etnorom.hu/pictures/mipumedutukovumevinikesoj.pdfIn PDF document text
    • http://frankifoto.com/uploads/pages/files/jubidosibebuw.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/0d00b5252d2067dc59b3a8fafb156fc6/paxegepedikotezaguxoxaf.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/zofatipilud.pdfIn PDF document text
    • https://xn--b8qxb801j.tw/upload/files/98692273722.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0c76daff2---zuwuw.pdfIn PDF document text
    • http://www.ks-klinika.ru/ckfinder/userfiles/files/zapogarimezit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=nba+2k+live+mod+apkPDF 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_off0000e36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB81 20680 bytes
SHA-256: b0873ab40287f1bbbe61514dde6487ec81b961b6a66d6d08cad600ed05987e43
font_02_sfnt_off0001323e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1323E 10476 bytes
SHA-256: 4b79b6a82a908b357b366ba054d0691f8f77caddb1a24bce13f883154b00f19a

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