Malicious PDF — malware analysis report

Static analysis result for SHA-256 2560725f021560ad…

MALICIOUS

PDF

83.1 KB Created: 2021-09-18 12:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 58ab09213501c34cadf0d558ec2d5029 SHA-1: 3616d80e7e448f132a4b9a8f4c72ec2fbe14ce79 SHA-256: 2560725f021560ad41645d253e8463274927531d081b7598f040e2bf22f829d0
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links to various domains, many of which appear to be link farms or disposable hosting, suggesting a phishing or malware distribution attempt. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass security scanners. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://wastran.ru/uplcv?utm_term=godfire+rise+of+prometheus+apk+data PDF link annotation
    • http://bburago.info/admin/fckeditor/userfiles/file/50745620834.pdfIn PDF document text
    • http://disonde.com/filespath/files/20210914091503.pdfIn PDF document text
    • https://booburger.myagenda.cz/pictures/editor/files/34759371434.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/wixufimagikevodinu.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138cc61148ee---guniteniwutigixepabuleba.pdfIn PDF document text
    • http://aquaclub.hu/userfiles/file/faxigopojusonukefeb.pdfIn PDF document text
    • http://zatacorp.com/upload/files/sonulapi.pdfIn PDF document text
    • http://metrominicabs.com/survey/userfiles/files/madovareliwi.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/vefimo.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/40808361651.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/fumonaminamajebefopalod.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/26628227913.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/kaginap.pdfIn PDF document text
    • http://ndt-ultratech.com/files/10252730963.pdfIn PDF document text
    • http://chinahongji.com/d/files/rowamokexa.pdfIn PDF document text
    • http://ncfc.com.tr/ckfinder/userfiles/files/piratoxuxixajisijejidap.pdfIn PDF document text
    • https://dichocungtoi.com/userfiles/file/reneguruxowobividolozewa.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/25031482428.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/b18a78a618901607f6c48a4405896bfb/14278762594.pdfIn PDF document text
    • http://kavtas.com/images_upload/files/64520099077.pdfIn PDF document text
    • http://apisicul.com/userfiles/files/92417918369.pdfIn PDF document text
    • http://gelinyuanyi.com/upload_fck/file/2021-9-13/20210913235720680453.pdfIn PDF document text
    • https://bold-iot.com/uploads/files/202109070202093691.pdfIn PDF document text
    • http://lse.hu/userfiles/file/tabejif.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/21492857389.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_off0000dadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADD 19172 bytes
SHA-256: 23d4471db1fc2e8859bb6e45d1354669d461f152cfaa4a0d6c6f56800f365e37
font_01_sfnt_off00010d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2C 10844 bytes
SHA-256: 0e329461dbb21b3173088bffcc8a72c944795d179d437032bddce421dcf7d7ca
font_02_sfnt_off00012647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12647 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1