Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb130eddac6a116f…

MALICIOUS

PDF

54.6 KB Created: 2021-02-15 01:52:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 0694d1c76076226a7e5fcbd82d17668d SHA-1: e8f01623895e3b2cf1407ba19bd96e5905662ae4 SHA-256: cb130eddac6a116f37b46133d23ab6d555244084b82fa57a3314658c414e5eea
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDFs, suggesting a link farm or SEO poisoning attempt. One prominent URL, 'https://leonvi.ru/aws?utm_term=arguing+about+literature+1st+edition+pdf', is directly associated with the document's apparent theme. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8460

Heuristics 4

  • 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
  • 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/aws?utm_term=arguing+about+literature+1st+edition+pdf PDF link annotation
    • https://doxibizogo.weebly.com/uploads/1/3/4/8/134893922/visumuva_bidelabar_pazamujiragip_sukisij.pdfIn PDF document text
    • http://dujoxizuzepofom.iblogger.org/article_worksheet_for_class_3.pdfIn PDF document text
    • https://naketutetan.weebly.com/uploads/1/3/4/6/134660231/1006510.pdfIn PDF document text
    • http://akvatehnika74.ru/6294679465lnwl2.pdfIn PDF document text
    • https://cdn.sqhk.co/bijukipuj/JghWZic/bazesarulemuzikeriledavi.pdfIn PDF document text
    • https://xilexuluta.weebly.com/uploads/1/3/6/0/136094269/1273166.pdfIn PDF document text
    • https://cdn.sqhk.co/kopozufu/WfjCjaC/neha_kakkar_song_youtube_video.pdfIn PDF document text
    • http://gawaxoxirerefi.22web.org/77993429184.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/cVhfidh/44902855528.pdfIn PDF document text
    • https://cdn.sqhk.co/tememagitapo/aYvhgii/1294714404.pdfIn PDF document text
    • http://unosital.space/dotojufemomajokuvijatobemwu4l1.pdfIn PDF document text
    • https://rogapunuki.weebly.com/uploads/1/3/4/3/134375427/293325.pdfIn PDF document text
    • http://damita.fun/high_school_geometry_worksheetsnfo4r.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/garorowa/eclipse_git_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/carrom_game_for_java_mobile.pdfIn PDF document text
    • http://kapugekemasili.rf.gd/c_template_function_definition_in_header.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/eth-_gas-_reporter_reporter_not_found.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/ipcc_report_executive_summary_2018.pdfIn PDF document text
    • http://sasaroguri.rf.gd/vibamitadesirujen.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4EE 5272 bytes
SHA-256: af20842bae199f2f820a6994a72eb64c40777441e7638af7a53d0a18a3b24851