Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb61cd2f809aa286…

MALICIOUS

PDF

74.4 KB Created: 2021-03-30 00:27:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 127835410492060be79ede2b8bd7abf1 SHA-1: 6b87647a3bfc267be09d9867b7e27809590f590c SHA-256: cb61cd2f809aa286184ed62be8219b5c6c39263ef8f7644cc7eed7956e3f489a
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a suspicious domain, identified by heuristics as a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to checking codes, aligning with the suspicious URL's apparent lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://pelibifir.ru/strik?utm_term=check+codes+on+polaris+ranger PDF link annotation
    • http://beremoter.online/x_head_cannon_deckk8ejk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383692/normal_602d992cda979.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446921/normal_60214e34af246.pdfIn PDF document text
    • http://realnoe-obshenie.online/14967812522jdbai.pdfIn PDF document text
    • http://legko.travel/jodha_akbar_serial_video_mp4t1oin.pdfIn PDF document text
    • http://torchqbfl.fun/152708303617p5fj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389358/normal_5fd77002146dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489844/normal_602b09591d608.pdfIn PDF document text
    • http://1cats.space/pogusubefuvevlkm4s.pdfIn PDF document text
    • http://tuxesimufimiti.mypressonline.com/hamilton_vocal_selections_free.pdfIn PDF document text
    • http://sepozimog.scienceontheweb.net/90627592460.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477878/normal_60205698d2c1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379371/normal_6030a34581902.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://medexode.atwebpages.com/stretch_out_strap_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/expansion_joint_sheet_size.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/jungle_book_names_cubs.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/how_to_find_gypsy_moth.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/machine_learning_with_python_ibm_coursera_quiz_answers_week_2.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/how_to_troubleshoot_a_kenmore_microwave.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/20966786052.pdfIn PDF document text
    • http://dapufojutujat.atwebpages.com/vigoxomadiwuxofadapidedod.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_off0000e716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE716 5304 bytes
SHA-256: 78ed7d124992538193eb50696034f7006b799650f91c02855d0c50b3257f18e2
font_01_sfnt_off0000f917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF917 10372 bytes
SHA-256: 5c2548d0ce45cb808cfcba379ed901eb71d12eda87a29c6b1690fff2a980fb38

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