Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3ec20b77e802292…

MALICIOUS

PDF

72.6 KB Created: 2021-01-22 04:47:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: c2901378621adf2b830b798c78586aed SHA-1: 60192ccfe04016e3bb502a2f6d48d880fbfaf40e SHA-256: b3ec20b77e8022921fc049035182697c6b4f7a3971023a118bc3b99bfdd9c76a
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for a link farm containing numerous external URLs. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, suggests a lure related to a 'guide', likely to entice users to click on the embedded links. The presence of external URIs and a link farm indicates an attempt to direct users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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
  • 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://jottigo.ru/123?utm_term=ffx+2+remaster+guide PDF link annotation
    • https://site-1179658.mozfiles.com/files/1179658/absceso_cutaneo_pediatria.pdfIn PDF document text
    • https://malolikekex.weebly.com/uploads/1/3/4/7/134718462/66e3d16.pdfIn PDF document text
    • https://cdn.sqhk.co/vudemijugamu/hgjfKm6/knight_rider_halloween_knight_full_episode.pdfIn PDF document text
    • https://jawoxaze.weebly.com/uploads/1/3/0/9/130968973/8037373.pdfIn PDF document text
    • https://guxovegetixewaz.weebly.com/uploads/1/3/2/3/132302910/mizik-gogiz-sekurapi-jasosewuvizogo.pdfIn PDF document text
    • https://jewelilug.weebly.com/uploads/1/3/4/3/134331877/kugagiwatowule.pdfIn PDF document text
    • https://rofunepez.weebly.com/uploads/1/3/2/7/132710772/kirerefapa.pdfIn PDF document text
    • https://dopapebo.weebly.com/uploads/1/3/4/8/134870178/3b7fd2b1dd43.pdfIn PDF document text
    • https://site-1250930.mozfiles.com/files/1250930/ankush_raja_bhakti_dj_song.pdfIn PDF document text
    • https://site-1177846.mozfiles.com/files/1177846/nfl_week_5_predictions_bleacher_report.pdfIn PDF document text
    • https://site-1249625.mozfiles.com/files/1249625/5260126132.pdfIn PDF document text
    • https://tusidotug.weebly.com/uploads/1/3/4/4/134482214/e7e86286d58edd7.pdfIn PDF document text
    • https://cdn.sqhk.co/vomifavafo/Aidgcgd/cat_running_wheel_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/wefekoferu/VSQshAA/xetefevesidoxigimibivozeg.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/dipafuxe/anaphylaxis_management_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/taniroxerapaxijozi.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/bukitedamuxaseruwejatop.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/accountant_cv_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/locker_group_perforated_metal_sheet.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_off0000dfd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD8 5348 bytes
SHA-256: 52de440da6292985c01d72776d4a21142482ae62c3cb94a0a37498a9638bd5d4
font_01_sfnt_off0000f1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FA 10692 bytes
SHA-256: f8834475bd22b5f9ce1dde640d9fee1be06cb85a601c5341dca8fce169ea6f56

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