Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ccf6f23b1194904…

MALICIOUS

PDF

160.0 KB Created: 2021-06-14 03:05:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d03b7fbddcc069b447b6ea42eaa87bad SHA-1: 81c5fa1461e5ae317e0be25bb15a85df07fc813a SHA-256: 2ccf6f23b11949042423ac68f39649f16f63ab49f1ecbe5afb7a6d03e4c60de1
284 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document exhibits multiple indicators of malicious activity, including links to compromised WordPress sites and algorithmically generated URLs, suggesting it's part of a phishing or malware distribution campaign. The heuristics indicate social engineering tactics, specifically a 'ClickFix' lure that prompts the user to execute commands via Win+R or a terminal, and a visual download button. These elements strongly suggest the document's purpose is to deceive the user into downloading and executing a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 10

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://coretry.ru/uplcv?utm_term=dj+wale+babu+mera+gana+chala+de+download PDF link annotation
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757df0534e1---62063861288.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16076cb7e154be---xumukoxunijijuji.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/d2ca22e8eafc358493f389312660725e/ziziwutafepugola.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c199cc9f335---85242553420.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/b4aa84ea0219c1843e187252210c87b7/86197049699.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b803a2a9e17---14748509822.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/bsssntpmf14l4qofvcpvaghho2/rigimuwolawiposizida.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/41948349346.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160934ab2438bc---gasozemikiwomufu.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/bunudebowagerexobupos.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/9ob4ni3eo0e4tg6l6ojvnknd74/37629725995.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c8a2dcdd0---85673515496.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/4ggqgh9i1ba3e9616h1cceqga6/pesofesigupilig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20CAE 3628 bytes
SHA-256: f91d4d7e018b9b5a96b44a70b8e0b530edd382526cbf631ea8a13b08b03e9405
font_01_sfnt_off0002199a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2199A 5480 bytes
SHA-256: a74205ced9c92bc6de27ad760d69515410360f2000260c61c413748ce007341b
font_02_sfnt_off00022c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22C27 12900 bytes
SHA-256: 34764f1b1e93dec5cd3888b342a676194470e9a6920c20e27f774607d6b07486
font_03_sfnt_off000256cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x256CB 17756 bytes
SHA-256: b4d487428ed4794c5ddbf4083f107ce16b7a1f7e062b62dd115a9ea994a8991a

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