Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b84feb7cd9388b9…

MALICIOUS

PDF

67.7 KB Created: 2021-02-13 16:57:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0293e42293f08efc13466d11fca85d35 SHA-1: 6989f95531a0939c2669d3059101a7c68beaf65e SHA-256: 0b84feb7cd9388b9d46a1403a953ac33ef3910aee7c66a92f161f2bf8b163fe4
176 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a 'PDF_SEO_LINK_FARM' which indicates a mass of external PDF links. The primary URL, 'https://baarspo.ru/wix?keyword=bingo+heaven+apk+free+download', suggests a lure for downloading software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://baarspo.ru/wix?keyword=bingo+heaven+apk+free+download PDF link annotation
    • https://xetuvamabur.weebly.com/uploads/1/3/1/4/131409037/gigewokoruzuworasu.pdfIn PDF document text
    • https://cdn.sqhk.co/rozamulev/bibQmEa/xiruloxaxopisi.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/hfyhejc/boduj.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabakope/dDNkhii/launch_meeting_themes.pdfIn PDF document text
    • https://cdn.sqhk.co/vedukosamo/gxhcDic/58566146693.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481695/normal_5ff7801ddf7d8.pdfIn PDF document text
    • https://cdn.sqhk.co/rubuxupab/cIk5Hgd/defender_land_rover.pdfIn PDF document text
    • https://winugemu.weebly.com/uploads/1/3/1/0/131070294/nizixigavutaza.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/cjcjfje/barrett_jackson_redhead_sold_sticker_girl_2020.pdfIn PDF document text
    • https://bunupujitoj.weebly.com/uploads/1/3/4/0/134017728/bevixivokufuwanadub.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebililofo/jiihGhf/battle_of_boston_hockey_twitter.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391326/normal_6002075845eb1.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/6tihggp/ruxumeripajoxo.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/isGZhjE/zevezemazukufus.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/ianUHeD/33342170269.pdfIn PDF document text
    • https://bemafaparad.weebly.com/uploads/1/3/2/6/132681832/moxazi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463287/normal_602594b97083b.pdfIn PDF document text
    • https://cdn.sqhk.co/wesifarajaru/gLjbTIo/29_card_game_free_download_for_windows_7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407081/normal_5ff016ac0d7a8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cc49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC49 5388 bytes
SHA-256: 9fe83e9fece52f497dbc924afd223204eae6f50455b12da1a9b47afb1a9dc692
font_01_sfnt_off0000deba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBA 10212 bytes
SHA-256: a65fdaa658ea7c24688e566a495692f3c75546ea47ad68fd6773e9e9c4ee0e10

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