Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aeb6016e65029ea…

MALICIOUS

PDF

82.1 KB Created: 2021-09-06 00:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: cace29c563bea468be9939f7307a7ff8 SHA-1: 5bb8017724761da6113a47c3ff435034b7e116fa SHA-256: 2aeb6016e65029eaf2c9142dde2ad2e45429dbeb22bf818a5306217a93bc577e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.007 JavaScript

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which appear to be compromised or disposable hosting. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document likely prompts the user to install a browser extension or update, a common social-engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to redirect users to malicious sites or trick them into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • 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://crewmak.ru/uplcv?utm_term=yardworks+5a+electric+grass+trimmer+14-in+manual PDF link annotation
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/fla09r5u446q0kl6vti3gnb7h7/zigolokebotezogax.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/muzifoxige.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/51002955929.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095d8370c6fb---sekulaxedo.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2a8e1d056---38219835284.pdfIn PDF document text
    • http://sxcec.org/userfiles/file/19368150989.pdfIn PDF document text
    • https://eprobatdz.com/ckfinder/userfiles/files/8631305760.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/wezavatudu.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/3053403517.pdfIn PDF document text
    • https://alutat.com/data/file/95973894744.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/931a5e6b3aaabc7c209141e656e9b618/tijos.pdfIn PDF document text
    • http://derma-dts.de/files/file/58272303245.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/lavab.pdfIn PDF document text
    • http://haniltm.kr/upfiles/editor/files/kavolipugakab.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/koresetinozuberix.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/89056114813.pdfIn PDF document text
    • http://kawoka.com/userfiles/file/49626033856.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/3796031361.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/lkdh06jhvshem01k45nqgqa414/65834540460.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/202143073708969.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/kerabunemefonabux.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad1f52a27e---xelajekirakatawowi.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/5b8f13d4b5a79ea6720657cb43adeea7/posozasus.pdfIn PDF document text
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/xejapuxoguwap.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca493121ac2---belegamelojitoke.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD619 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE30 11272 bytes
SHA-256: 7c776c5c702e2245d33244d2ca6233c15bf01231207ebb34eb7df08c8a1f9a05
font_02_sfnt_off0001089f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089F 19080 bytes
SHA-256: 6e487dcf78d7475188d59adb59ebd230a30e884f30e44dfaecd85e4d2efac6c6

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