Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3a58166f4b4d0c5…

MALICIOUS

PDF

73.5 KB Created: 2021-03-01 11:42:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 48670d9c1155b38ea20943e75887bb78 SHA-1: 1f1f2012718f10f6766bdc640dd568507ad05290 SHA-256: d3a58166f4b4d0c5ec530b341c3a978772b4e1c48767bd1d4bbdcdf7ea9d3ccf
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/123?utm_term=how+much+does+it+cost+to+get+ase+certification PDF link annotation
    • https://cdn.sqhk.co/sarafogu/fdCf6jc/xilezanu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_6022af037e493.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/OjiYjji/pupifukosafufisuw.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/sgiSicg/pulse_3d_wireless_headset_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375087/normal_5fe2071066074.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/stihl_fs55r_carb_adjustment.pdfIn PDF document text
    • http://figupatofewox.iblogger.org/answers_to_interview_questions_for_sales_position.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/Ljagdjf/dungeon_crawl_stone_soup_beginner_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373797/normal_5fd2503561c04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471682/normal_6005d6a94d0d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387243/normal_5ff3cc8ec1998.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wipadafefuxasi.onlinewebshop.net/list_the_7_characteristics_of_all_living_things.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/pepuzatimoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/new_badaga_songs_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/chesterton_community_college_school_uniform_shop.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/guided_tours_from_helsinki_to_st_petersburg.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_off0000e35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35F 5456 bytes
SHA-256: 50b05e093e222400329d98824de18ecf5e1d29f3ea95feb83a6588b8a950a664
font_01_sfnt_off0000f5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D1 10320 bytes
SHA-256: e7b653a3beafa00e87944d2d559dd7e99ebfe46c7fbc373133666334b79fc477

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