Malicious PDF — malware analysis report

Static analysis result for SHA-256 d27b8417cc2ec4a2…

MALICIOUS

PDF

114.5 KB Created: 2021-04-09 14:49:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7fb3de5a820975fb1d969eaf81a3a826 SHA-1: 80f99ad5f0bee300deba19a037791ac2f702803a SHA-256: d27b8417cc2ec4a23c24998b9cea5fff05c3a5d8f92feef0bce1e6d5649b7f20
116 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample is a PDF document flagged by multiple heuristics, including ML classification and ClamAV, as malicious phishing content. The 'SE_CALLBACK_LURE' heuristic specifically indicates a callback phishing or tech-support scam pattern, urging the user to call a phone number. The embedded URL, https://ponafet.ru/strik, likely serves as a landing page or part of the phishing infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ponafet.ru/strik?utm_term=simple+human+soap+dispenser+blinking+red+and+green PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380859/normal_602a7b2d0a4d5.pdfIn PDF document text
    • http://viwoxufegoger.sportsontheweb.net/36199629235.pdfIn PDF document text
    • https://cdn.sqhk.co/wamefuvew/ifvKhh1/find_the_grammar_mistakes_worksheets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462379/normal_5fd0426dd317b.pdfIn PDF document text
    • https://cdn.sqhk.co/wejafivelij/iSshjpf/ionic_4_tag_input.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486367/normal_606defad5fa39.pdfIn PDF document text
    • https://cdn.sqhk.co/satofurijob/jdeja0X/bead_sort_java.pdfIn PDF document text
    • http://kekewawoxugar.sportsontheweb.net/vokijijo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501201/normal_600e5bff0f396.pdfIn PDF document text
    • https://cdn.sqhk.co/sowojusawepu/jiiakhe/sikiralisekifisebafotuxid.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/ti_84_plus_ce_games_pokemon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380539/normal_60436e0d597e9.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/Vhahces/creative_app_wallpaper_ringtones_homescreen.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/rimejiguvif/widokuk.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/90693044637.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/easy_backup_and_restore_apk.pdfIn PDF document text
    • http://beliraguw.onlinewebshop.net/coordinate_grid_mystery_picture_printable.pdfIn PDF document text
    • http://lafagelupuf.myartsonline.com/grammar_practice_book_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/singer_sewing_machine_free_motion_quilting_foot.pdfIn PDF document text
    • http://fusozevukatamir.atwebpages.com/vavefagir.pdfIn PDF document text
    • http://manuwakagekewu.onlinewebshop.net/air_force_model_paper_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/corporate_letterhead_template.pdfIn PDF document text
    • http://bipegokatif.onlinewebshop.net/xizewusevogazupubaxutif.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/el_nombre_de_la_rosa_castellano.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_off00017deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DEB 5680 bytes
SHA-256: 58dac5ecede725d61a06cca6014ed189b7efb8d6b053571cb3220de8fd78683c
font_01_sfnt_off000190fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190FA 12224 bytes
SHA-256: c85b5494c340b0bb47a73f28c5dfd0c04b552f01ca4b8b9afc2ecc9f1462042e

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