Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f11e09d5ee3d02…

MALICIOUS

PDF

154.9 KB Created: 2021-07-15 11:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 665a03ddb743243b4ebe0762fdd5c631 SHA-1: 0de7385ad744a2b2577280aee8378fe830f8c103 SHA-256: a2f11e09d5ee3d02156e94bc5322174c95de3a7c724b668e706cd4a9b0a560c4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users. The presence of PRC/3D content and embedded URLs further indicates an attempt to exploit PDF vulnerabilities or deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9843

Heuristics 7

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/0b6143dbbcb5991be72002a43bed9b5e/zenabixadige.pdf In PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a90d72a7aa4---vexedexiwumes.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fc67c9df6---fuzomurisegopipo.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f656cfc2e---57985042966.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/87011226532.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/9b7d5bb0fc52eedf7a60b582f11f3998/tiragapiluniwajefiw.pdfIn PDF document text
    • https://saam.vn/images/content/file/jeziku.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160abc0ccd88cb---libepifugavokanedaj.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/b22eace92ac0c613ae4af003eed2777b/wafewilamorosewububeror.pdfIn PDF document text
    • http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/72fa8aba0d447fa7748708832f8ecf33/zorudebojemivaviwun.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/rezabejanu.pdfIn PDF document text
    • https://sankohomestay.com/userfiles/files/zoteguvubebunoliwojil.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/b1378e133ec315930181304efacca77d/jiromitonani.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/ec2ec2a8e164d0c72d632df72b958516/24338705891.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/64009795488.pdfIn PDF document text
    • http://webbuilders.com/files/file/setenuludedewakab.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/vogoxolewalelidekoze.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3c223a1932---zuxodadigomokegagexewinob.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/34677583626.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d0b47f3e16d---90566859137.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bde7e56a7---81987179113.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/4d72db427b970f15dc34637339a08057/xejubesukisewogilepelulo.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/bupotoru.pdfIn PDF document text
    • http://wych123.com/upload/files/91972733165.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=day+trading+with+price+action+galen+woods+pdf+free+downloadPDF 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_off0001fd44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FD44 11100 bytes
SHA-256: b651045328abfca0090e558791c50490252158cbe3aee92fdb29d54498e420c6
font_01_sfnt_off000216f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x216F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00022f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22F05 17804 bytes
SHA-256: 4247a5f658d225c58e84824bc57b776a0004c434bfe9ba6431f057e7acfa7082