Malicious PDF — malware analysis report

Static analysis result for SHA-256 949925db04b3acc7…

MALICIOUS

PDF

82.3 KB Created: 2021-03-15 13:26:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3ffe2296b7b6ec5690a57c481f25a466 SHA-1: b4ec4426b6622626bfaa4f1468279cb315e93905 SHA-256: 949925db04b3acc73c94f0c7bfb07907b4098fb16d87d7e3d26569561aee6e32
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/123?utm_term=cricket+score+sheet+app+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366000/normal_604dce9416bbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387229/normal_6000a90351426.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385617/normal_5fe29588cedec.pdfIn PDF document text
    • https://duvutotan.weebly.com/uploads/1/3/0/7/130775700/3404471.pdfIn PDF document text
    • https://dekitinuro.weebly.com/uploads/1/3/4/8/134871397/pezezuredu-rejifijuxot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450624/normal_5fe5281b6a3d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492892/normal_6025cd6c5b23d.pdfIn PDF document text
    • https://vakozumemarob.weebly.com/uploads/1/3/1/0/131070483/rapigosofu.pdfIn PDF document text
    • https://felevigapoboxoj.weebly.com/uploads/1/3/5/2/135299972/b4616e3aea2863d.pdfIn PDF document text
    • https://rovonowevon.weebly.com/uploads/1/3/6/0/136051941/kotasupi_fozag_rorisuvokudaneb.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/wufujudisu/cardinal_family_feud_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/4738467001.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/abcd_movie_songs_2019_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/rijama.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/janosinikimazujagapig.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/vurujewerufevo.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/giwovonupiburuvekupape.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/jukipukareze.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/a4_tri_fold_brochure_word_template.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10341 5040 bytes
SHA-256: 462a1700bb6cccfc18279aefe189f2421705a6b2de07c2a3480651b4cc2b2557
font_01_sfnt_off00011467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11467 11500 bytes
SHA-256: 121afc1774ca97748643a8003c503d91dd10179aa93477fefb4f5843d56c9fcb

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