Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fd7257199890b34…

MALICIOUS

PDF

72.3 KB Created: 2021-06-21 05:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe74b595c30c125298abc0cca9b3ef57 SHA-1: 4076a2f8fa1c7b27ac7901b387b7fe0834a847b1 SHA-256: 2fd7257199890b340c00eb183a8b998109ce11c258ebe7921cf41d46aa554753
244 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains heuristics indicating it's a link farm and uses social engineering lures, specifically instructing the user to copy and paste commands into a terminal, consistent with ClickFix attacks. The embedded URLs likely point to further malicious content or payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 9

  • 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.
  • 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://huntic.ru/uplcv?utm_term=installing+chrome+os+on+old+laptop
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/c5fea0cc8ea25d0b083d6208a0664ebe/repufedafeverajupixatewar.pdf
    • https://hpsoft.shop/upload/files/ratebiwoxaketoko.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/kt6c304h5eca063ff1a95oekt1/gabiriwopajope.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160752900d0f13---doteroxivob.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/8ea03b3a0f7bdf3880fd3c9d937dcd78/zefodirevekogos.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160983d1e04915---47920879802.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bab824a5249---47608845168.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759806f1ac6---93146884426.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608924a6223c9---96368394942.pdf
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/4578ab092c7d5279bf73db5338106626/28235475665.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b2ef8f813---wasoke.pdf
    • http://dermaktif.com/imgup/file/63687761631.pdf
    • http://gyobel.itpublic/file/87803402935.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/hj8r941dr06qrd64b56n51vu9v/68160360428.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbf5.bin
b7b088e2ba4fa4d7e219bb6addb5d0fd660058112c9bd5a952440c8f63001955
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF5 5424 bytes
font_01_sfnt_off0000ee3b.bin
818aed9714c3ae3a08a3a65919b772158f4a4d39009bec46908a5b17e8d06583
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3B 10596 bytes