Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0d0251e3659cde8…

MALICIOUS

PDF

80.0 KB Created: 2021-05-03 21:20:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0c2233690cb335e62e4be7b595ca27fd SHA-1: 72b1db8484ddd64ee783463e8bddfec85bacc4d3 SHA-256: b0d0251e3659cde8106271513b45ec6c73b5cc978ca268bc415565bb23082aa8
172 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are likely part of a link farm designed to distribute malicious content. The heuristic 'PDF_SEO_LINK_FARM' and the presence of multiple external URLs strongly suggest a phishing or malware distribution attempt. The ClamAV detection and ML classifier further confirm its malicious nature, indicating it likely serves as a lure to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://midufefew.ru/strik?utm_term=what+kind+of+charger+does+jbl+xtreme+2+use PDF link annotation
    • http://uablog.website/nfl_fantasy_football_ppr_draft_strategyc4cwl.pdfIn PDF document text
    • http://outputqwvk.space/tomtom_go_60sfg4ll.pdfIn PDF document text
    • http://zhigina.ru/corsair_graphite_760t_v2_reviewt8865.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zerisonapuki.rf.gd/61812062573.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/namie_amuro_love_story.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/zulawonoxibeduf.pdfIn PDF document text
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_2cc1ee58cb1c4a6b84fb61a830c60536.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/36351849781.pdfIn PDF document text
    • http://jilazarow.rf.gd/27851332821.pdfIn PDF document text
    • https://e7ba4f66-d023-404d-a355-a5b98970f127.filesusr.com/ugd/cac9e4_a4d57f155bed49069dc94f859ceff37d.pdf?index=trueIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_836d7793ee004f6f8ae726eaaddd8759.pdf?index=trueIn PDF document text
    • https://409b2d23-5c1d-402e-97df-26c0da9299b0.filesusr.com/ugd/2e3d42_449efbc014334277afb77b5fa743edf7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/percy_jackson_2_film_streaming_gratuit.pdfIn PDF document text
    • http://dipumekamerara.rf.gd/latest_android_software_update.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/flight_sim_xbox_series_x_reddit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE756 5812 bytes
SHA-256: 1b64b25c1a11463f5deeb9be53a71e0921003cb5f23c0e71384560301b3d45cd
font_01_sfnt_off0000fb01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB01 12536 bytes
SHA-256: c4dc58afce05b692bff106fe9b28a7cc697fb4fe5d88023950f9d13bc8529033
font_02_sfnt_off000124bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124BB 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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