Malicious PDF — malware analysis report

Static analysis result for SHA-256 322e6b3f352013ee…

MALICIOUS

PDF

84.6 KB Created: 2021-09-05 06:35:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6607076e3cb8fcfd659b64078a9bb0ec SHA-1: 31cc1c7c352126f96ee31d68cf86e228f18878f8 SHA-256: 322e6b3f352013ee3b2ecf5589f033271cde8adfe6870c9fef942c2420e4359e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was identified as malicious by a ML classifier and ClamAV, flagging it as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised CMS upload directories and disposable hosting. The document body is heavily obfuscated, preventing analysis of its specific content, but the overall structure and URL analysis strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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 http://auto-spec.ca/fck/file/titegexa.pdf In PDF document text
    • http://meta-min.com/files/93339067862.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/fipuzoraporovavudijek.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/lijowivobodadisoje.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/6e646f272e06c3f4a8975ed9ac9b3e06/mepew.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/wigejogitaketeli.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/romomorugivunuxakabojo.pdfIn PDF document text
    • http://ooexperience.be/assets/Image/files/9157923629.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/91389055971.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/75934236903.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/xejek.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f4a9390f89a---vebomikupadukapizege.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/a91d026f2be090c66593827caba84b89/6239642020.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/19a9lq772raijl2sf0s70mum6e/26466396161.pdfIn PDF document text
    • http://tcihk.com/userfiles/xukodex.pdfIn PDF document text
    • http://szkolaprywatnaleszno.pl/userfiles/file/31881486815.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160af12bab840e---fuwesogid.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/4d177ab2e4b51bf57db16a7495eb082f/genukizigivovuramud.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/juarf8br1hmkmk030degvou0no/borelitemoxanes.pdfIn PDF document text
    • http://canoeing.by/pics/files/gikuxokegitanibewe.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/955f9ca2c3d239b292dfaa44b99ce063/23067233296.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=asus+lga+1155+motherboard+manualPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/2e85585f5c2c387a256a9d9ffad2aed7/6488207900.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_off0000dfec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEC 19548 bytes
SHA-256: 8bf855022f9caaac86242073377a028e96eaa15fdf9107571fbe7edb112012ee
font_01_sfnt_off000113b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B4 11008 bytes
SHA-256: 79335e96d207733cdeb30193f404058a582de3fc400af4efb43817031a7dc6f1
font_02_sfnt_off00012d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1