Malicious PDF — malware analysis report

Static analysis result for SHA-256 374744550fb68943…

MALICIOUS

PDF

88.6 KB Created: 2021-07-07 17:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 41cdaae45024980ca7263ed1f7d922cd SHA-1: 4f9181695fda0b5e595bcb87166ec0e8b39c250a SHA-256: 374744550fb6894372d7369086c525b29a213fb0819df0b6545ab97ffa704bcd
236 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File Execution: User Execution T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It exhibits characteristics of a social engineering attack, specifically a ClickFix lure, by instructing the user to execute commands via the clipboard. The document also contains numerous links to potentially compromised websites, suggesting an attempt to redirect the user to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/f2937f04d8f1b71bcf6fcfa40b2b2219/648247014.pdf In PDF document text
    • http://jessicarossitto.com/clients/7/7c/7c16b8c799dae9ffcd1258f31d6ff645/File/musewajijudojawo.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/dazedubixuxerejagezipoguk.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/55804337738.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/v7ofgmr6tevtvrkvkg4g4sesee/84474033326.pdfIn PDF document text
    • http://come2menorca.com/images/file/92414191765.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/84a624008b53d1382e6aa3925e322e45/xomuzugusopeneluruzafoji.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090508c8869c---moxepu.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e37d71d753---40441438577.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c83197eaf---sonin.pdfIn PDF document text
    • http://overtonnation.com/clients/f/f9/f97855507a39dfa58978186db9bff07a/File/26210745618.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/vme6k9vs9r79u5mngjd2i4u8o6/bafozoxafalurigez.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/77072615920.pdfIn PDF document text
    • https://olterus.info/contents//files/kixamez.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/fce79ce98327f01d65e52c506739bb98/mexosebozubojib.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/202152109383494.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210625151257149.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/fagodemor.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/54388400997.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/aqh5g3p6iv7ocud45bo1or6qf1/34476281442.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/d962557b1b8e4831f86755b73d134b37/gazarituxawu.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/58730223013.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/7b113ca83bd014636c4b7750940f4df9/ranaluwokeroge.pdfIn PDF document text
    • https://subarini.ro/mm/file/tafezegunavasit.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/507e0566283c90c143ffa741f2ec49c4/tikugomimobij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+can+i+change+my+computer+passwordPDF 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_off0000f69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB2 11208 bytes
SHA-256: d0df8a5fad9376a44a172000a43cb2cdcf7894dc19f63a941caceae5f2285278
font_02_sfnt_off00012894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12894 16988 bytes
SHA-256: d30140fdbceb11be2c542cc9445f8b7bbb330c288a39ad66813780cba9d6fcd3

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