Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac57012a04a61adc…

MALICIOUS

PDF

74.5 KB Created: 2021-03-06 16:05:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3f825b2fc0fef517e01811028c2cb179 SHA-1: 112db4f376f708facfd8a61f5f94ea15cbba3865 SHA-256: ac57012a04a61adcf6483b4d1d516906a4177908cdfc17cf94aa077113a63f55
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lure users to malicious sites, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/123?utm_term=digitech+jamman+stereo+manual PDF link annotation
    • https://cdn.sqhk.co/nozedimasav/ifgggeP/27563739619.pdfIn PDF document text
    • https://cdn.sqhk.co/zukuxenopo/gcc0hc1/48305242723.pdfIn PDF document text
    • https://cdn.sqhk.co/felolavap/hhdiiid/37733770762.pdfIn PDF document text
    • https://cdn.sqhk.co/nagigureti/3rBtFje/play_christmas_hidden_object_games_online.pdfIn PDF document text
    • https://cdn.sqhk.co/lisesemafo/icjdii4/secondary_school_teacher_application_letter_sample.pdfIn PDF document text
    • http://trackcreditscore.info/kamisama_hajimemashita_op_2_piano_sheetn16ij.pdfIn PDF document text
    • https://cdn.sqhk.co/dikulodut/fPhiXzz/sinefixara.pdfIn PDF document text
    • http://egosikenclub.com/galaxy_s8_over_the_horizon_ringtone_downloadgf58f.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/jiiekM4/osim_uinfinity_luxe_massage_chair.pdfIn PDF document text
    • http://classkaod.ru/bernina_1230_bobbinzhp8b.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/hhY6Fdg/steamer_for_food.pdfIn PDF document text
    • http://instas.site/can_you_still_create_an_xbox_live_account_on_xbox_360n67x8.pdfIn PDF document text
    • http://modutomipofa.iblogger.org/love_couple_hd_photos_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vamosopon/geB5ibb/lumosity_brain_training.pdfIn PDF document text
    • https://cdn.sqhk.co/mewowoji/ihNlhh2/electrical_installation_cost_calculator_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/Hmihtii/xinosijiz.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebevon/bjhjgfr/5693025129.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vuxikujare.epizy.com/mohabbat_hai_kya_cheez_video_song.pdfIn PDF document text
    • http://vopogelos.epizy.com/photo_gallery_website_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/galileo_commands_pocket_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/visatuj.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_off0000e5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DB 5288 bytes
SHA-256: 79d4334cf8cabf9010c80dcb75b72d65eeacb25ff4822aca9e4532784e151ffc
font_01_sfnt_off0000f7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B9 10300 bytes
SHA-256: 1837be98dbcb4b683f0080e20d766dd50f88519eeafed58a0f71386826411ab7

Open this report in the interactive analyzer, or submit your own file for analysis.