Malicious PDF — malware analysis report

Static analysis result for SHA-256 c64897fbe8cb30a2…

MALICIOUS

PDF

77.6 KB Created: 2021-04-21 10:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5f2b1902579267d42acea97b7f397149 SHA-1: 00507e6d27cbe5c85ed4fa4d13600f993017d1da SHA-256: c64897fbe8cb30a22894bee1dbb573cacda42a21431be44e332202d0174f812c
326 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link T1059.007 JavaScript

This PDF is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a credential phishing campaign targeting Microsoft users. It contains numerous links to disposable domains, suggesting a link farm designed to obscure the ultimate malicious destination. The document also includes lures for clipboard command execution and password-protected archives, common tactics to bypass security controls and trick users into executing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 9

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://penaxixix.weebly.com/uploads/1/3/0/8/130813526/jedasagofipomasivar.pdf.
  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://mezovuduw.ru/strik?utm_term=how+can+i+reset+my+h.264+dvr+password PDF link annotation
    • https://penaxixix.weebly.com/uploads/1/3/0/8/130813526/jedasagofipomasivar.pdfIn PDF document text
    • https://suwodofiwimi.weebly.com/uploads/1/3/4/4/134495338/mumogotafuvov.pdfIn PDF document text
    • https://zoxiniguve.weebly.com/uploads/1/3/4/5/134584112/fukegewisut-bijeliputu-kugokasojo-dobiwedurami.pdfIn PDF document text
    • https://lakogobeza.weebly.com/uploads/1/3/4/0/134096968/tatimozemifofavuzo.pdfIn PDF document text
    • https://vefenebef.weebly.com/uploads/1/3/4/8/134885139/wataw.pdfIn PDF document text
    • https://tujobofawoti.weebly.com/uploads/1/3/2/6/132695409/lovupubaviwizazize.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/beUrgeP/coin_collection_books_whitman.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/ciaq7tc/72005378992.pdfIn PDF document text
    • https://ranemexamegen.weebly.com/uploads/1/3/4/4/134440137/81857.pdfIn PDF document text
    • https://cdn.sqhk.co/voguzasijur/gjjjhic/fish_eat_fish_3_player_games_unblocked.pdfIn PDF document text
    • https://siwuxamafovad.weebly.com/uploads/1/3/4/4/134489720/b15a2a24e718e1.pdfIn PDF document text
    • https://tulitexuson.weebly.com/uploads/1/3/1/6/131636586/jabubowalifikux-dudepif.pdfIn PDF document text
    • https://cdn.sqhk.co/dasupejej/gXjjnjh/free_music_download_app_for_iphone_6_offline.pdfIn PDF document text
    • https://nalokulomegeze.weebly.com/uploads/1/3/4/7/134758193/be27b07f4c.pdfIn PDF document text
    • https://cdn.sqhk.co/nilulugaj/ieChahb/mad_dex_arenas.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/cbf87198-13df-4597-a827-42aa88e698ed/successful_writing_at_work_concise_4th_edition_by_philip_c._kolin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/438394ce-99bd-4001-84a5-9b96a347c8b1/how_to_sync_vivofit_jr_2_with_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4da76511-62da-4286-9d59-8ed86f81280f/28289131842.pdfIn PDF document text
    • https://a2c67b61-a01d-4053-b7ad-f1487bca8054.filesusr.com/ugd/24853a_a6942888593040aa8979f6f7d6f5b576.pdf?index=trueIn PDF document text
    • https://28ed73df-463f-41d7-bc87-4635118fd8e0.filesusr.com/ugd/74acc8_a3a27a8da8c14131ae36439c8494b21f.pdf?index=trueIn PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_0b056dd4d394470ba3219f3bc3dd33ba.pdf?index=trueIn PDF document text
    • https://30bb9d03-04f1-4043-8ca4-b11f08dd7d37.filesusr.com/ugd/82ab19_b8d1e52fd8db40e2a7c74c0d45d222a2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b3408b6-b417-4548-bc98-cb723e81433f/kemuzokotonefujepivafi.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_off0000ed50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED50 5900 bytes
SHA-256: 0c0dc3ac091ace06020c284758fbabaecdae80ea76307cea07c21f0bfac40cf4
font_01_sfnt_off0001016d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016D 11908 bytes
SHA-256: 397daa3e17cf3ee79d070a7179217ee188e2e9fb2165270cddaceaeb4b19afe1