Malicious PDF — malware analysis report

Static analysis result for SHA-256 3775a50de11ca2fe…

MALICIOUS

PDF

85.2 KB Created: 2021-08-16 20:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ce32d6237d2385f46ad9bb8ffdd842fd SHA-1: 9251da1cee23ba98fc8681e4a1cf3db37c920ace SHA-256: 3775a50de11ca2fe562bbfcee8595391bb8bfc9c16f5f5c3b8a80a1ab192e783
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 https://chcial.ru/uplcv?utm_term=need+for+speed+no+limits+mod+apk+download+latest+version PDF link annotation
    • https://photojet.bg/userfiles/file/gupidafezugukigomamexuja.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/gijumevufudegowi.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/39870522186.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc89e893ce---lililovokamaga.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/45964059031.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/4e0712bfdf5adf3cbb4702034723ee7e/51716329706.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/32916527797.pdfIn PDF document text
    • http://studiomalpocher.it/userfiles/files/71936523555.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42d831c607---kiroranitafo.pdfIn PDF document text
    • https://mangmalungtea.com/userfiles/file/60435417602.pdfIn PDF document text
    • http://teaandtiara.ca/clients/c/cf/cffd5a667a547ddf6f7ed7e454f715b7/File/46366078483.pdfIn PDF document text
    • https://digireg.ru/upload/16944826672.pdfIn PDF document text
    • http://erdbau-rauch.at/29200732135.pdfIn PDF document text
    • http://ipublicity.cz/data/file/71499632310.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/d5a642796d3fabd335a5a0d93964fe86/wusasisipuwulev.pdfIn PDF document text
    • http://al-farh-iq.com/upload/userfiles/file/77724497810.pdfIn PDF document text
    • https://zhansq.cn/upload/file/vimodanaxivixi.pdfIn PDF document text
    • http://cukiernia.eu/upload/files/fimufo.pdfIn PDF document text
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/79290975128.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/u0qde6kb5u9bevlu44jpn2el75/49974650823.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/tekexirobipu.pdfIn PDF document text
    • http://hit-air.pro/ckfinder/userfiles/files/kupojurexepofakiluvuxuno.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/e0829b24ebec3b5b76ccd6fc70445169/99252055846.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/43272137499.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_off0000e627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE627 10880 bytes
SHA-256: 7336d494d40b370f43e1db3904be3bea687bac2e31659dc8a67ec97a0389586c
font_01_sfnt_off0000ff56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11768 17756 bytes
SHA-256: efa8b3040e17eb067a47acac389579379b80306d11a6677d84b7ad9ccf9a4497

Open this report in the interactive analyzer, or submit your own file for analysis.