Malicious PDF — malware analysis report

Static analysis result for SHA-256 66649030c32c5424…

MALICIOUS

PDF

99.4 KB Created: 2021-07-24 14:51:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 99bef442020e982c0ace654c9cd8617a SHA-1: 0d5c20f8d519c58bb3a874155a08657a44675fdd SHA-256: 66649030c32c5424182db74a9d688b52233c25fbbc36e7e129c8640fbbc603c8
212 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and multiple links to compromised websites, indicating an attempt to deliver a malicious payload. The document also includes instructions to disable security software, a common tactic to bypass defenses. The presence of a visual download button further supports the lure of a malicious download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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.
  • 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://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/9b23e051d0a1752741ec54422c0a0495/86953533168.pdf In PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160902ae4efc91---89838418662.pdfIn PDF document text
    • https://eric-parnes.com/ckfinder/userfiles/files/42327500798.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c95eeb7ccc1---zopiseve.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160733242ac985---94203770457.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/kerojiraxamitagosami.pdfIn PDF document text
    • https://wietsevoermans.nl/ckfinder/userfiles/files/kiropojaxevoxologegepivo.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/379csino62ou278rs153svb4no/39661434038.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160790c2c7d25a---36246751393.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/97242445195.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/98486833729.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/wifabumubesimijanawiku.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/k4nhnu051ka2em0bbu1mrj7sk2/14348812426.pdfIn PDF document text
    • https://dm288.rs/slicice/file/88001063661.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cf7890c13---dufewopek.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c475fa4d574---40733185682.pdfIn PDF document text
    • http://landmanenterprises.com/clients/6/66/660ad4be7ac834282af30b44844c6003/File/jigasipef.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/xuzeruzaxazebupujinuvem.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/645f0e650a16761775ea425bd9cb36e6/dunaxukubona.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/9fb26442aeacc0ed29288ea68fd350db/pupofonotinerumibejiruwe.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7256586c0---72270452824.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/dadososa.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/vibuvitetijivuverikok.pdfIn PDF document text
    • https://reinigungsfee007.de/wp-content/plugins/super-forms/uploads/php/files/12kqi0cra7ovn6jine3vd3lcu7/nejerimasemozefutuwuronav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=avatar+legend+of+korra+game+free+download+for+androidPDF 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_off00011a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A45 19064 bytes
SHA-256: 74be2405ed4f6f61ea6856da32497c9e24d4d0486d1042ff53095727170ddd3a
font_01_sfnt_off00014cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000164dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164DC 10756 bytes
SHA-256: bcc697ecd4b312584fa8a5f23eebeb502dca1885046ceb9497ae703b76bd442f

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