Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1bfad7f1acf4fd2…

MALICIOUS

PDF

70.8 KB Created: 2021-05-08 07:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ef3fb8e6a878fe58e9764785a52eeacd SHA-1: 51ba9bc0b49af80e2adbbdc2bdfbeef8e760c7bf SHA-256: e1bfad7f1acf4fd27bcec2ca4f98c14e68b5b2af341b66a584c9b3d5659b4de5
156 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 other PDF files, suggesting a link farm or SEO spam tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/strik?utm_term=foods+you+can+eat+on+the+wild+rose+cleanse PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375896/normal_60055dd3bd57f.pdfIn PDF document text
    • https://gaturavokig.weebly.com/uploads/1/3/4/3/134317265/684e14010e1.pdfIn PDF document text
    • https://figedojopijobe.weebly.com/uploads/1/3/4/7/134769561/teloj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446924/normal_60579a50a325c.pdfIn PDF document text
    • https://cdn.sqhk.co/duwefetufe/ejehbhe/bible_stories_for_children_s_tagalog.pdfIn PDF document text
    • https://cdn.sqhk.co/gezefesete/xjdgeYi/dragon_ball_super_intro_2_lyrics.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/vasapatevubitol.pdfIn PDF document text
    • https://cdn.sqhk.co/wepugozotap/7bgh8pK/41426821012.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxapivasif/ihchgj1/earn_recharge_by_playing_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387821/normal_5fe9373922508.pdfIn PDF document text
    • https://falizuzu.weebly.com/uploads/1/3/4/5/134506804/8890456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456393/normal_6038956d9bf22.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/zifozujiwi/sezixiwuzizog.pdfIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_5fb60dccd4a94856b991d00cdfe240ed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gogonof/sample_abstract_for_laboratory_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/77323830279.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/8281067989.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/logid.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/visio_org_chart_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/99444706991.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/fz_bike_2008_model_mileage.pdfIn PDF document text
    • https://486bfeb6-87d8-40a3-812f-3449909c9139.filesusr.com/ugd/81b904_be00488f870248ccb299b13357269525.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zowejunef/kizisevaxurorajobevak.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_off0000d627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD627 5176 bytes
SHA-256: ba0b1b6dc1424f69f60351cbb7f0dbfe0627646fb2cec2b0965771da5c5c7646
font_01_sfnt_off0000e7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D3 11036 bytes
SHA-256: 698e94fac52277000f93437f9f5e177765e0d17a4a3f6e71a5d627b432d6c7c8

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