Malicious PDF — malware analysis report

Static analysis result for SHA-256 f74677124e7b0b6a…

MALICIOUS

PDF

73.5 KB Created: 2021-03-03 23:57:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7922d8d76bc6f0b4fca7034b04fbacfc SHA-1: 7625b6b41180e823fbcaa86253135bff23147078 SHA-256: f74677124e7b0b6a5e9213d8fafc42aff2b0e440cad9408db999a573a9d63aa0
196 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. It uses a password-protected-archive lure. 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 0.9999

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
  • 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.
  • 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
  • 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://jacksth.ru/aws?utm_term=principles+of+microeconomics+mankiw+chapter+6+ppt PDF link annotation
    • https://vexefanakaxaki.weebly.com/uploads/1/3/4/8/134871487/897e9676.pdfIn PDF document text
    • https://nikuwexipamojag.weebly.com/uploads/1/3/0/8/130813731/jeturodamofuxi-fivago-donudaxesefo-jufofed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462036/normal_5ff76a3cde646.pdfIn PDF document text
    • https://belanuxaru.weebly.com/uploads/1/3/4/6/134670531/jawivabogomutadaned.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495860/normal_600edab8b1353.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409107/normal_5fcfa661a3582.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/xalexojaxipud/11982632165.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/destroy_the_opposition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/absage_formulieren_nach_vorstellungsgesprch_arbeitgeber.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/anjathe_movie_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/android_native_ads_in_recyclerview.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/tinewogegugamered.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/23903442827.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/puzzle_master_sbc_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/pozat.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/android_tv_box_apple_airplay.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/church_event_flyer_template_word.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_off0000e04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04D 5568 bytes
SHA-256: 24ca057550baac48b34fd67dda6eb3a3a61f914bf5cd3c0ec9db54732c60aba5
font_01_sfnt_off0000f323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF323 11204 bytes
SHA-256: 5fbbfe33a74a62cec243325c796c999a640ce7a4a0d0bb3901ac68fe369c310e

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