Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30bfa771dd27cee…

MALICIOUS

PDF

172.1 KB Created: 2021-03-01 16:54:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 19d29d17b23eff512d6efd0cd89f3564 SHA-1: 2dacf5c0f8a6479346a26171c42576248afbd86a SHA-256: d30bfa771dd27cee222dab51ad09e355603dcda6d10e5e749c6a64d0f9eced61
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. The presence of a 'Clipboard command execution lure' heuristic indicates the document likely instructs the user to copy and paste content into a shell, suggesting an attempt to execute commands. The embedded URLs point to various domains, some of which are part of a link farm, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 8

  • 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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/wix?keyword=mod+apk+f1+2016 PDF link annotation
    • http://damvglaz2.xyz/navy_seals_workout_movey4vk3.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/discrete_mathematical_structures_4th_edition.pdfIn PDF document text
    • http://luxomozuk.mypressonline.com/82179629958.pdfIn PDF document text
    • https://cdn.sqhk.co/sunidoxil/hcogdCF/sea_battle_tactics_game.pdfIn PDF document text
    • https://cdn.sqhk.co/pesenexur/ChjdjaL/xaruve.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/Skc6je4/55173853070.pdfIn PDF document text
    • http://arfeshome.com/8537681323022bsr.pdfIn PDF document text
    • http://leaninrzpd.site/kim_b_foglia_answers4nwrt.pdfIn PDF document text
    • https://dowisapi.weebly.com/uploads/1/3/4/2/134266119/3040584.pdfIn PDF document text
    • https://zemokozovoxepuj.weebly.com/uploads/1/3/0/7/130776726/fukila.pdfIn PDF document text
    • https://cdn.sqhk.co/gukovafax/Ihe7Oje/puxexawolitajuxufozawij.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/hjjjgex/top_100_old_bollywood_songs_free_download.pdfIn PDF document text
    • http://kukushka.space/bhojpuri_video_song_dj_remix_2018azoy8.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/ib2jiPc/45143101153.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruxuwidoke.epizy.com/1000_oraciones_en_ingles.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_off00026957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26957 5276 bytes
SHA-256: a416db5dce82b1ccfbe10f91f5ac005c129a21a7f6535644a80b6e00f98fc11e
font_01_sfnt_off00027b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27B79 11528 bytes
SHA-256: dd41990746aca58cbf6b416be44680db87e651aaf1b40964cf10280b6ea9714d

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