Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a2db77d67276fa…

MALICIOUS

PDF

84.2 KB Created: 2021-07-02 14:27:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 568e1dac531880230fb8ceb40d0eb655 SHA-1: 54bb8673a0a6f5c8ad755cdbb344951d537dc117 SHA-256: 06a2db77d67276fabd3aa01edc7abff997e7983cc1aab5c3eb717eec48ab1c02
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and disposable domains, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics indicates a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://sjalikave.hu/pictures/file/99903244978.pdf In PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11d6b8367b---15551152125.pdfIn PDF document text
    • http://poolprotektor.com/userfiles/file/10028798243.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/45e215371f06025af56cf682262febfa/82297896705.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c570881fc40---24555615293.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/xezigumabikitas.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/21101524506.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/fb7c5f64fae56d4675f65d25509ca45a/23264676271.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/9e08e5e4a3e76cdb7f9a66ce207b21d3/76032670945.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ab908134e---49183540996.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/543ba5699da90e4457e5cdc7e06b2372/lafokonamilulatogesidep.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/foradixelatepi.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/043c85da9c4f3f523b626222b85229a4/44234968007.pdfIn PDF document text
    • http://mvclassof1990.com/clients/8/8c/8ca0ba2c7a07c5cd1f21f9fc323c16c5/File/geriwogazezoje.pdfIn PDF document text
    • http://cheumst.com/upload/fckeditor/file/jeboleturome.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/zizoleximobune.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0edaf7e199---27866974088.pdfIn PDF document text
    • https://actor-conseil.com/files/file/932690481.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/vixidido.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ce5e3e6f8---92404069718.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9788990a33---zewosuw.pdfIn PDF document text
    • http://sxcec.org/userfiles/file/widapekukomikejisanenul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=ovarian+cyst+operationPDF 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_off0000e72e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72E 10524 bytes
SHA-256: 035783e16e540e3b10e16c8d139b3f02cffce5b949a0a4a6c62325cc3c16b3a1
font_01_sfnt_off0000ff5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5C 17288 bytes
SHA-256: c3c58a6ad2cea4ee00559c22dec4d528b1e33f6ebd335a18669a21cb9b1420e4
font_02_sfnt_off00012b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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