Malicious PDF — malware analysis report

Static analysis result for SHA-256 6099e648a95f3545…

MALICIOUS

PDF

123.8 KB Created: 2021-07-16 11:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 10009c39cac1d5eef93976b7f1186c33 SHA-1: e48d4329e13fb9cd5a6e9441172dbe86f5b87408 SHA-256: 6099e648a95f3545c56df5f23f153f84c410227e75e434e19670e1f850e5428b
212 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and multiple links to potentially compromised or disposable hosting sites suggests it's designed to exploit vulnerabilities or trick users into downloading further payloads. The 'Clipboard command execution lure' heuristic further supports this, indicating the document attempts to trick users into executing commands, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://hoangle.vn/uploads/userfiles/file/dewuse.pdf In PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/ac86rn2n0efpcibqdpjb8qijq6/vudezuroxubot.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/899912929.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608556ebee0ef---85656724565.pdfIn PDF document text
    • http://train-in-japan.com/images/blog//file/55864703016.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/7d47752ad2a3a18a63664c06603b7d99/13031960016.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/gedowagizezupomubibojo.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/9i4dfe6t5abkmj4hjrn4ena3q3/jimugojug.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607966efe6360---87648889996.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/ruxuzasak.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/qobjeqhr1kto8iv0dsm2dv1q41/nosem.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/fbm3a1p3huf7qgtfus3mfhehd0/punitilizavedolizijak.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609eae16e9fe9---bixigodumutaxagozod.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/4jncgi731h626g5m71q7ldijsd/70625643698.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/nn7mm37g1psbi3f6dl3smsf0ih/85025670364.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/2624729096.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/3412d7142cd65d6b53e17bac57fb83f1/vitagorupogaxiwep.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/7712312763.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/6632293e664a75db034dc2f2b46853ed/36657189681.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/sorexowodotofin.pdfIn PDF document text
    • https://lymfologi.se/anvandarbilder/221/files/39042573579.pdfIn PDF document text
    • https://tsegypt.com/file/sojizisur.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/jukeduridudoxiro.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/4c025837a7f7434a3ad609b7273055cf/71145584368.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=can+i+download+minecraft+on+chromebookPDF 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_off00018004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18004 10920 bytes
SHA-256: 90fce2448706745319d2edf440abcf7277bc919824558ed4844fe0d9dfcf1ccb
font_01_sfnt_off00019924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19924 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001b136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B136 18380 bytes
SHA-256: fea2b8625e3aba4761e0a96c2d2c4632c36de4c5a0bb2cfa880cbabd918823b7