Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aaa2f40ee7dac9f…

MALICIOUS

PDF

118.8 KB Created: 2021-03-25 13:15:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c4f920ef18da34a39b68110507246516 SHA-1: 1f30270aea6ed2f2069e82c3f45adc331c5bf891 SHA-256: 8aaa2f40ee7dac9f46a99f4da1cad17649bb082521b6307ca5fa16672b1fe9b3
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik?utm_term=mamiya+c330+blue+dot+lenses'. This URL is likely used to redirect the user to a phishing page or to download a secondary payload. The ML classifier and ClamAV also flagged this PDF as malicious, supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=mamiya+c330+blue+dot+lenses In PDF document text
    • http://bluebadge-support.com/how_to_eat_move_and_be_healthy_downloadxpfs1.pdfIn PDF document text
    • https://cdn.sqhk.co/xemuxebu/qiahiji/birdy_skinny_love_lyrics_meaning.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/94769993097wocew.pdfIn PDF document text
    • https://cdn.sqhk.co/midijanere/icZgfgi/music_player_equalizer_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pijajawopoji/hjjfzdN/jogixojudig.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/jimerhd/hospital_grade_power_cord_14_awg.pdfIn PDF document text
    • https://cdn.sqhk.co/gotofebelu/0xbGnG0/sunkist_fruit_candy_orange_slices.pdfIn PDF document text
    • https://cdn.sqhk.co/mutexeze/cigihij/houston_traffic_road_closures_map.pdfIn PDF document text
    • https://cdn.sqhk.co/vijukifezu/gdJoggj/minecraft_world_edit_advanced_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/wieDicE/forest_wallpaper_for_walls.pdfIn PDF document text
    • https://cdn.sqhk.co/gatezoru/digibge/lego_hidden_side_70423_bus_geisterschreck_3000.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/g2bN0gd/business_insider_logo_font.pdfIn PDF document text
    • https://cdn.sqhk.co/sazobenapur/RKifhft/28474717246.pdfIn PDF document text
    • https://cdn.sqhk.co/lipetebo/Z3gdCB2/new_english_songs_2018_and_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fuvidokibet/23218760267.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/you_will_be_alright_meaning_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/1017687146.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/24795938384.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/window_cleaners_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/ultimate_mortal_kombat_3_sega_saturn_rom.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/12800817730.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001570c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1570C 5424 bytes
SHA-256: 386f8eaf7c673a11c5aa265d6829a06efc586994b1b5812e2b309ee65be9fecc
font_01_sfnt_off0001695c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1695C 2376 bytes
SHA-256: a44ea18a51990cb72e91048a406e4dc7b4b26369bfebb4c3ba77ab90312b8fcc
font_02_sfnt_off0001742c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1742C 18796 bytes
SHA-256: fe0862e227540abad0571edf282928504d2d9725e3bea8a8f625c50dfb993d86
font_03_sfnt_off0001a91a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A91A 16108 bytes
SHA-256: a02b4dc2188a840b3361eef1c55b5fe24c4303f9aac0f601ba988c27a415505d
font_04_sfnt_off0001bdea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDEA 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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