Malicious PDF — malware analysis report

Static analysis result for SHA-256 df39f193e8b2e5c6…

MALICIOUS

PDF

80.1 KB Created: 2021-04-09 05:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 74614f35b5f1867d303f8cabce7e8480 SHA-1: f6376c071dfa4848652758459f251b7db0319510 SHA-256: df39f193e8b2e5c60db72c399d7ab5035436ed58e751b00ee85df40aff37c228
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL that redirects to a link farm, which in turn hosts another PDF. The document body text is obfuscated but appears to be related to the lure URL. The presence of external URIs and link farm heuristics suggests an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/strik?utm_term=what+does+fenrir+symbolize PDF link annotation
    • http://rixorevu.getenjoyment.net/felebuterapuwupol.pdfIn PDF document text
    • https://cdn.sqhk.co/nabolokewido/jhc47ja/ansar_ahmad_shaikh_marksheet.pdfIn PDF document text
    • http://securityverifiedservices.com/free_printable_multiplication_color_by_number_worksheetsm1ue8.pdfIn PDF document text
    • http://namelesssouth.xyz/contradanza_violin_sheet_musicoxdwz.pdfIn PDF document text
    • https://cdn.sqhk.co/zalopubid/hgQjfZ9/25607259223.pdfIn PDF document text
    • http://opencabinets.xyz/powermate_5000_generator_6250_subaruoygav.pdfIn PDF document text
    • http://jadaribod.mygamesonline.org/19350688899.pdfIn PDF document text
    • http://esplus.pro/what_are_the_6_elements_of_poetryu6paf.pdfIn PDF document text
    • http://nizuloxodiza.iblogger.org/common_application_gpa_scale_reporting.pdfIn PDF document text
    • http://itawegan.space/46387034373q3x6d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5632edf9-d5e7-4209-89d8-a0dc02f244c7/hp_8600_printer_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5560abb-76f2-4cf6-95d4-c2ec2474ff37/how_to_login_my_icloud_without_verification_code.pdfIn PDF document text
    • http://nugafafekovad.epizy.com/habibi_english_arabic_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48c320fb-75d4-487f-91d3-1540741ad0f8/23106286911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf7a3178-c7f0-4913-934d-36e0af3c084b/38852746202.pdfIn PDF document text
    • http://sikirubuguje.epizy.com/kumeverironaniwobalosik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c21ee15c-a85e-45d0-91a0-a29969a73169/how_to_unjam_a_ryobi_nail_gun.pdfIn PDF document text
    • http://tizedukef.epizy.com/41126644979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18490869-5fa8-4fc1-9a7e-29592e6e7a46/95301495734.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/104874e3-88b8-4b79-ae05-d3eeed44f317/how_do_i_turn_challenges_into_opportunities_brainly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd2d429-9deb-4146-8dfe-eaf915322d70/zajimoforiwurorizet.pdfIn PDF document text
    • http://mojigoka.atwebpages.com/81250940409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56f8a35b-3d69-4739-aefd-d81e5b506faa/how_to_use_wilton_piping_nozzles.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_off0000fa1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1E 5452 bytes
SHA-256: 792b902fc2c65668c815a7aefd5e22fdac573ed84a6273d46b9eb1ec16d3e41b
font_01_sfnt_off00010c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C98 11480 bytes
SHA-256: f6393f9ea427c418677530bd33ff8c27e2a65ab8956f9c12d27c0f8a7a0c8753

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