Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b179d15ffb2502…

MALICIOUS

PDF

80.4 KB Created: 2021-03-14 13:29:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1634d6476e194fce57d5a0d91b952fd SHA-1: 16a57fda77d70e1faf2dd22d5ce63748c6978a41 SHA-256: a7b179d15ffb2502dba4889a18e8c1c112aeb7e51e92ea399dcb98e4083ff2d9
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it redirects to known malicious infrastructure. The embedded URL, 'https://yafferge.ru/strik?utm_term=how+to+pass+drivers+knowledge+test', is the primary indicator of malicious intent, likely serving as a lure for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/strik?utm_term=how+to+pass+drivers+knowledge+test
    • http://moreprodukti.com/52462262046fjymh.pdf
    • https://cdn.sqhk.co/jonuwezipagi/dgcYqPm/fefupijuvedadutidefe.pdf
    • https://cdn.sqhk.co/janurisu/ahihuwC/fishing_clash_cheats_for_ipad.pdf
    • https://cdn.sqhk.co/jajotulix/RiaBgjK/gisakufesarog.pdf
    • http://igcopyrightverify.com/broken_record_techniquetmt6i.pdf
    • https://cdn.sqhk.co/mamidusidozu/NUqajjY/running_on_empty_lyrics_evil_ebenezer.pdf
    • https://cdn.sqhk.co/zotenejek/igiaQUR/stay_alive_game_pc_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sukobogixe/android_5._1_bypass_google_account_apk.pdf
    • http://pojozija.onlinewebshop.net/how_to_install_sirius_satellite_radio_in_your_car.pdf
    • https://uploads.strikinglycdn.com/files/5e768925-ee9a-4983-b6e6-8ca719c0a3a8/88791860778.pdf
    • https://uploads.strikinglycdn.com/files/4dce83d4-4ff8-4fdd-a9a9-5acad1defb2a/what_does_blood_on_eye_mean.pdf
    • https://uploads.strikinglycdn.com/files/c401a84c-0c68-4374-af1a-303c641ab5fd/kenmore_800_dryer_start_switch.pdf
    • https://s3.amazonaws.com/lebaxa/spring_cloud_data_flow_shell.pdf
    • https://s3.amazonaws.com/mekonulegipero/mr_blobby_song.pdf
    • http://zupitatip.atwebpages.com/doxefipivozaxodi.pdf
    • https://uploads.strikinglycdn.com/files/c8065469-f576-4eb5-beaf-32f4adb3ffba/black_stone_cherry_the_human_condition_gold_vinyl.pdf
    • https://s3.amazonaws.com/bidemewufa/matlab_approximate_answer.pdf
    • https://s3.amazonaws.com/nafibanefexex/42672196151.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_off0000fe34.bin
371e621a3838fcc460f12fc0719acc5e3383d80551211a8310363d43ac1274bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE34 5304 bytes
font_01_sfnt_off00011065.bin
95dc0c6ccb0ae56190d3e7bf8dccc6f5fe011b3f1648b6c0384c13c81560013a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11065 10512 bytes

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