Malicious PDF — malware analysis report

Static analysis result for SHA-256 2417c4c619807136…

MALICIOUS

PDF

95.0 KB Created: 2021-03-13 17:05:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e149f815a2ca21efff541327e4a0ccc SHA-1: a3fa10c4c7ea0482d3ecce064e658a9e94a5f73b SHA-256: 2417c4c619807136196906cc02ec45651d4f563fb2122686b334a2b69183b7e9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are obfuscated or lead to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-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://bologen.ru/wix?keyword=wow+bfa+cooking+guide+8.3
    • https://cdn.sqhk.co/tisufupujeli/j8Uhggg/7852005859.pdf
    • https://cdn.sqhk.co/soxuxopova/P5jbgfS/hindu_calendar_2020_lala_ramswaroop.pdf
    • http://rosutob.getenjoyment.net/94341041675.pdf
    • http://fufexak.22web.org/29230852081.pdf
    • http://vegifeda.mypressonline.com/fevopevubiwavupo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zopenave/31010905990.pdf
    • https://s3.amazonaws.com/dazutun/capacitor_voltage_transformer_wikipedia.pdf
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_87925a43075d4ababfedb04ddd3f005b.pdf?index=true
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_4c1a8ad18da34666a8389c7bed904bfd.pdf?index=true
    • https://s3.amazonaws.com/xozeb/68629703505.pdf
    • https://827a6da4-a69c-4806-aaaa-db522494bc4d.filesusr.com/ugd/cb5916_434ab36db61f4c3ca7ba6f9412ae119b.pdf?index=true
    • http://vawinujofupin.myartsonline.com/new_headway_english_course._beginner._teacher_s_book.pdf
    • https://s3.amazonaws.com/vanatul/project_communication_plan_excel_template.pdf
    • http://nufiwimuzobo.onlinewebshop.net/walgreens_automatic_wrist_blood_pressure_monitor_reviews.pdf
    • https://bff5fdab-9fd0-4670-908b-a1308bb5a9cb.filesusr.com/ugd/227d0f_5f83437579694b228748e55adb5d65ed.pdf?index=true
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_cb5c5f9f44c841f9b4a31f1af5631114.pdf?index=true
    • https://s3.amazonaws.com/kegovev/change_song_mr_jatt.pdf
    • http://butadiviwev.rf.gd/accountable_form_no._51_philippines.pdf
    • https://18e99e0c-7034-4a8c-9069-267580a295b8.filesusr.com/ugd/b337f5_98afce1d24a3422fb52627ac12da08cc.pdf?index=true
    • http://visunes.myartsonline.com/autocad_2020_3d_commands_with_examples.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000133ea.bin
d11de42fff66390cf351505524f13d8c699779ae8e7a0725510a8a058057455c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133EA 5580 bytes
font_01_sfnt_off00014725.bin
cda84fbb7d68e190b26f6bb9c7bd2af32c491037a113168be01c6376b649f420		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14725 12028 bytes

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