Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe612a549443847…

MALICIOUS

PDF

78.9 KB Created: 2021-01-19 23:33:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e413c1180fd484c36a6ba8b3864fd1b9 SHA-1: eb833d614feb21d0a4c020ac4cc101a54527e0f7 SHA-256: afe612a5494438472c3ad6cfda5c36a400108021205165ba2d6c4a467b18bd85
154 Risk Score

Malware Insights

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

The PDF contains a link that directs to a known malicious redirector, indicating a phishing or malware distribution attempt. The embedded content, though partially obfuscated, suggests a lure related to a mathematical question to entice clicks. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/123?utm_term=what+is+the+sum+of+the+geometric+sequence+18+if+there+are+8+terms In PDF document text
    • http://toxebugusopasur.22web.org/video_boomerang_jojo_siwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477655/normal_5fa7008c5a7b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497095/normal_5fbb3acc390a7.pdfIn PDF document text
    • https://site-1252804.mozfiles.com/files/1252804/subixibime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373241/normal_5f9841a07c7b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462993/normal_5fd3abdf6c83b.pdfIn PDF document text
    • https://site-1179234.mozfiles.com/files/1179234/carnivores_dinosaur_hunter_hd_download_pc.pdfIn PDF document text
    • https://site-1175017.mozfiles.com/files/1175017/how_do_you_learn_to_sing_better.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406787/normal_5fdee61ccf89c.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/tulosa/military_divorce_guide_california.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/kyosaba_by_chosen_becky_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/vitogusoxopurofojomowuzig.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/pavizidemisimuxuralax.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/movie_trivia_games_android.pdfIn PDF document text
    • http://tipixerokofor.epizy.com/60874491165.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/ultrasound_scan_report_boy.pdfIn PDF document text
    • http://newurefaz.epizy.com/formations_avocats_sans_frontires_france.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/clothes_and_accessories_vocabulary_matching_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/operations_with_integers.pdfIn PDF document text
    • https://s3.amazonaws.com/fufaragebo/lakuminegibaziwupetonove.pdfIn PDF document text
    • http://fepadegan.epizy.com/gibelasaxagemokewomek.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_off0000f588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF588 5648 bytes
SHA-256: 4974a5a2f17a9992e44067cb58c07026de3de99c198023cd3bc880d8378c7560
font_01_sfnt_off000108a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A6 10840 bytes
SHA-256: aa58b68737ac27ca3720ea469efebdff1acaa6ffa673f390f845a6e174244517

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