Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5b18489ada46320…

MALICIOUS

PDF

91.0 KB Created: 2021-03-22 01:40:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebeb019eafa86465015d3b2e2d27cd63 SHA-1: 490199a64e27271f0212d534b284e89f8b809d16 SHA-256: c5b18489ada463200a91d3a03461e4d48da22ad5c35357ed76a633284a06207e
236 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a social engineering attack, specifically a 'ClickFix' lure, by instructing the user to copy and paste content into a command-line interface. This action is likely intended to bypass macro restrictions and directly execute a malicious payload. The presence of multiple external links, including one to 'midufefew.ru', suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://midufefew.ru/wix?keyword=zelda+oot+randomizer+multiplayer
    • http://bikejesoxatelo.mygamesonline.org/gagowob.pdf
    • https://cdn.sqhk.co/zesonixiv/T2Wupje/milesosavulok.pdf
    • https://lilugotowo.weebly.com/uploads/1/3/2/7/132711957/zikilabigefe-vorofap-vukob-doligila.pdf
    • https://fogufapepupol.weebly.com/uploads/1/3/1/8/131871477/mobixojerilawi.pdf
    • https://mebodamuruwij.weebly.com/uploads/1/3/5/4/135400263/fiwolixavuv.pdf
    • https://jipuziloki.weebly.com/uploads/1/3/2/6/132695969/lalarozobob.pdf
    • https://cdn.sqhk.co/sixojifez/Cgcjdgc/jejufekuti.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://1527c8d3-3321-4e9f-872f-e2bebb57bac2.filesusr.com/ugd/bf2d42_27fa83ab9c3749a1965ee37e00dfb869.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c35a9d98-f360-46cd-a7a5-a2cb3eb88cde/57017996172.pdf
    • https://67389751-14cc-4ed3-b660-7ef7239e4cc3.filesusr.com/ugd/bb5584_8b262c6f963f4bcca99403068b5e57a6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/78424d9e-7d85-4985-b7ba-4e06dc702b87/taco_bell_double_chalupa_box_calories.pdf
    • https://abaaaae4-9231-44fc-b12c-ad55ebcc68e7.filesusr.com/ugd/2ca09c_8a5247eefe0b4227914c934c4bbf46ea.pdf?index=true
    • https://16dc6c2a-32e3-4a69-9eea-5b59d93654f8.filesusr.com/ugd/176c29_92880b5179064443b7992090101098cb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7e92f647-5f40-4f30-9143-54b425d4cb00/boy_scout_store_tulsa_oklahoma.pdf
    • http://xusapibu.onlinewebshop.net/bokanejizomulekojeguro.pdf
    • https://uploads.strikinglycdn.com/files/047a480a-4d11-4e14-bfec-ab44a4ff7ffa/pattys_charcoal_drive_in.pdf
    • https://uploads.strikinglycdn.com/files/46ebd962-813c-4dda-9bb3-2d06f4b2f5b4/temple_of_sethraliss_mythic_keystone.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_off00012765.bin
50a95feb893a64ad9cb9192fbf5a6dcb5214ab93eb4dd329e1ac7c64602c7046		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12765 5036 bytes
font_01_sfnt_off0001387f.bin
548032b1d7496a91aba4907a8c759ba9360fd16a01d800dfd51595a07e7646e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1387F 11332 bytes

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