Malicious PDF — malware analysis report

Static analysis result for SHA-256 69cb678b967a2aed…

MALICIOUS

PDF

113.3 KB Created: 2021-07-26 00:34:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3a3e6a443ae16affb7c4ec141c83fc08 SHA-1: 9c085dd2ef7e610e0300b819fd051c77e5837b56 SHA-256: 69cb678b967a2aed4da19033062c2acb9aa9a7f0010c27f4553916782e168913
164 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL findings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/ebe70a3199ee445170a56e54cc714243/13649981937.pdf In PDF document text
    • http://gpba.ge/admin/ckeditor/ckfinder/userfiles/files/45606103386.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/kebiba.pdfIn PDF document text
    • http://coumert.com/images/file/jiganiforakipevanef.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/jagenugexap.pdfIn PDF document text
    • https://yellowstonewildlife.com/17122005003.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/70893817730.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/f2e35e857205320b0fcf830b70585ca1/82949005922.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/fce9d24ea8ae1bef040678c7b230803d/53699189972.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/134103f2b5eb541e7e8df9da86413455/norepufijox.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/bcbbb1197d988990ff0b5a3a98b81f7e/rozasibenutinuravimum.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092c1f05d980---wowufugobojuvut.pdfIn PDF document text
    • https://parc-hotel.info/file/52853505680.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/801dbbba0f99f55a87c1b6bcb30bf181/nosurojumur.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/73244980317.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/b873bb5b0605d47bddc0c14a9b0619cc/dolavesedisuresiduxevuwa.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607049862300f---59512341237.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d80665b8f---98083050588.pdfIn PDF document text
    • http://springbook.no/files/71507950967.pdfIn PDF document text
    • http://zonwering-belgie.com/ckfinder/userfiles/files/jugimeda.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/99548853543.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=longman+dictionary+of+contemporary+english+5th+edition+dvd-rom+free+downloadPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/15218392830.pdfIn 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://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
stream_007_off00019d3a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x19D3A 16928 bytes
SHA-256: 2a969dafafefc945fa25d40e99bf9f8192cddddf7af897f7ffa33a259d8373c3
font_00_sfnt_off00013477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13477 21036 bytes
SHA-256: 167b96d60cce60f37924baec96e0c88018c0abcdc1086ff9e6fe385446327863
font_01_sfnt_off00016a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18263 11460 bytes
SHA-256: 05b5c4b9771f2a2c8c58085dc2545d6dde255d969938572ef0b516cfdb28ecba

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