Malicious PDF — malware analysis report

Static analysis result for SHA-256 700b35ef5131848c…

MALICIOUS

PDF

81.6 KB Created: 2021-03-02 02:00:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a92da5916cb4331dc207b4043b83260 SHA-1: d966db1f66f160a202ef4228b47235913b243d20 SHA-256: 700b35ef5131848cf527c05a98cabe33ec1bfc7f67ceeb50848ff21663a973ff
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL, https://jumiwimov.ru/strik, is likely part of a phishing or malicious content distribution scheme. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=winter+is+coming+game+of+thrones+song
    • https://xomowozijirogap.weebly.com/uploads/1/3/4/6/134667332/6660215.pdf
    • https://cdn.sqhk.co/jadidawa/hJjs4xs/25448170627.pdf
    • https://cdn.sqhk.co/wifopuzuxiba/jegdOf7/notorious_pathogens_meaning_in_urdu.pdf
    • https://cdn.sqhk.co/zurajekiviw/hjxW7ij/fapenodewiwikoxitife.pdf
    • http://nejufez.22web.org/46359955133.pdf
    • https://cdn.sqhk.co/bemememu/ziaidhb/crazy_shopping_mod_apk_1._1._30.pdf
    • https://cdn.sqhk.co/popaxutu/gidOhcj/jirowazif.pdf
    • http://molexepoleku.22web.org/cuales_tipos_de_ecuaciones_cuadraticas_existen.pdf
    • https://cdn.sqhk.co/zikonidenijo/HxihcP0/vibij.pdf
    • https://cdn.sqhk.co/medipevagopu/CYhcJih/nizagivojovipet.pdf
    • https://siwelizotelet.weebly.com/uploads/1/3/1/4/131437983/topobopuwolabavi.pdf
    • http://dapobapi.22web.org/mumolubumu.pdf
    • https://cdn.sqhk.co/gixedomawa/gibIiiv/xovojiripigewikifojilosit.pdf
    • https://cdn.sqhk.co/befozaxulot/jRigghb/tati_subscriber_count_statistics.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://zusewijoje.epizy.com/39333626124.pdf
    • http://xorikija.epizy.com/celebrate_good_times_instrumental_free.pdf
    • https://s3.amazonaws.com/zufaxepixiguxax/math_worksheets_for_grade_3_multiplication_and_division_word_problems.pdf
    • https://s3.amazonaws.com/xuvamuba/72403831797.pdf
    • https://s3.amazonaws.com/zoluwivebiro/noliwewu.pdf
    • http://firixafuzive.rf.gd/battlefield_1_dlc_size.pdf
    • https://s3.amazonaws.com/fejenijovekozu/gali_disawar_gaziabad_faridabad_ki_report.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f37e.bin
3bcad6e70fdfed7c8ad222bed875b9d9fc32edacb80626daee54c230b3eb77fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF37E 5064 bytes
font_01_sfnt_off00010489.bin
9868a3178a38bc1b7dd060229e2f22447b79d94e15f5cf07b51e6ef2141778e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10489 10604 bytes
font_02_sfnt_off0001289f.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1289F 4324 bytes

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