Malicious PDF — malware analysis report

Static analysis result for SHA-256 412c03ca0cc1473a…

MALICIOUS

PDF

81.6 KB Created: 2021-03-14 02:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e1ed415af008bd9b2f457134003e6d55 SHA-1: 277264a2aa9bc522bb02583841d059ad63673d7c SHA-256: 412c03ca0cc1473a64e928e5fa33237b2f6b8239f64c1211b15f0c68b5d51a8d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO spam. While no scripts were explicitly extracted, the presence of numerous external URIs suggests an attempt to redirect the user to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/wix?keyword=roster+form+set+notation PDF link annotation
    • http://biweekamnf.com/nuclear_bomb_moviesh4yn7.pdfIn PDF document text
    • http://mifirejetevina.getenjoyment.net/simple_job_application_letter_format.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/5373307654.pdfIn PDF document text
    • http://smartradiobf.ru/safety_data_sheet_for_morrisons_thick_bleachu1gni.pdfIn PDF document text
    • http://lyudi23.ru/2012_hyundai_sonata_hybrid_battery_discharge_warningu0rq0.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/zojirushi_bread_machine_manual_bbcc-v20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/29577535758.pdfIn PDF document text
    • http://sugizujesel.epizy.com/wobusidigipematerogufip.pdfIn PDF document text
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_4825db2b84b44cdeb823c8b38a8c65ab.pdf?index=trueIn PDF document text
    • http://rizaxofu.rf.gd/jatusesez.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/devegasuxadoteweli.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/a_christmas_carol_movie_2009_netflix.pdfIn PDF document text
    • http://kamabutexukawiv.rf.gd/android_fl_studio_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/88229970208.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/job_offer_letter_template_uk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/adobe_photoshop_cs5_full.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/71312453215.pdfIn PDF document text
    • http://fawikinego.myartsonline.com/29027012730.pdfIn PDF document text
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_ebdb864d3a694923a009fe49d37e77e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fazujo/bexomugadeve.pdfIn PDF document text
    • http://vezonufibil.epizy.com/vowurunajani.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://scripts.sil.org/OFLIn 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_off0000eb52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB52 4888 bytes
SHA-256: 8f4ba91ceeef501e2d645385cc76cca61117aaa25cb9b258df2a329c49fd5219
font_01_sfnt_off0000fbda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDA 11084 bytes
SHA-256: 10114978917ec6fcd8dfa2be207b53857f80b5c8bd21a0b57cb955f0eef16027
font_02_sfnt_off00012219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12219 16144 bytes
SHA-256: 25dc1b7d69cb91644f28a5d849e004c6f464f5b7ca2df743cc20f0bbd1bcfc9f

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