Malicious PDF — malware analysis report

Static analysis result for SHA-256 9081764d33c8ff64…

MALICIOUS

PDF

82.8 KB Created: 2021-05-15 11:30:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d29091addac9a6bf49034622e2d370c5 SHA-1: 0b60ed23252bd26b69897a6a66ab0eca5c774726 SHA-256: 9081764d33c8ff641c54803d0e73c67bc86f598b32960170506384ad48e8e634
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1059.003 Windows Command Shell

This PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to copy and paste content into a shell, a common technique for executing malicious commands. Several external URLs were extracted, suggesting a potential download or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://resalured.ru/strik?utm_term=how+to+get+mp3+to+itunes+on+iphone+photos PDF link annotation
    • https://cdn.sqhk.co/xibidodoko/TmiaICC/42119344275.pdfIn PDF document text
    • http://mevakimuvu.mypressonline.com/8236833859.pdfIn PDF document text
    • http://mainsale.pro/best_hashtags_for_instagram_followers_and_likesnxsax.pdfIn PDF document text
    • http://bupedezokeromon.iblogger.org/64298511905.pdfIn PDF document text
    • http://mugukix.mygamesonline.org/15526029575.pdfIn PDF document text
    • http://big-ita.space/25563428323d2lti.pdfIn PDF document text
    • https://cdn.sqhk.co/jujifefa/WX6hhia/820985417.pdfIn PDF document text
    • http://tejowigasinafu.getenjoyment.net/ver_pelicula_doa_barbara_con_maria_felix.pdfIn PDF document text
    • http://minosijasif.mypressonline.com/sikinuvenibolesiginas.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/vlookup_example_excel_sheet2wqdw.pdfIn PDF document text
    • http://rating-bookmaker.ru/zellik_kayt_izelgesitorx9.pdfIn PDF document text
    • http://monongzhlh.space/kung_fu_techniques_bookwt11q.pdfIn PDF document text
    • https://cdn.sqhk.co/fofesali/hhge7hd/lifisegujijifuw.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/86dee4dc-4896-47d4-a4cd-e9001578a4e3/timijopozarujup.pdfIn PDF document text
    • https://28ed73df-463f-41d7-bc87-4635118fd8e0.filesusr.com/ugd/74acc8_b6dc550cd6b54064837be3984c793ea8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b54beb9-bfd3-48f0-822d-8f59379e0ef9/80813964719.pdfIn PDF document text
    • https://75ca6b5e-a470-4e0e-8004-b00a9f1721b4.filesusr.com/ugd/1e4819_b59946d31aa14a09a6d0e277ebbfbf5e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c187789-cda5-49ba-a1d3-fd064821c339/68167201877.pdfIn PDF document text
    • http://rizivubonulej.atwebpages.com/senior_digital_designer_salary_london.pdfIn PDF document text
    • https://0621cc9e-6449-4e8a-a8bd-baee9ad62a2c.filesusr.com/ugd/affb4a_935db542e4e64df8a92d9e11893f3dab.pdf?index=trueIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_127e28121c0d46428fb38fa34711878a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c25d970-e4d9-4054-9eef-ac6d34d8b9c2/wumewetamavazogizenos.pdfIn PDF document text
    • http://jesasudazewur.epizy.com/human_muscle_anatomy_worksheet.pdfIn PDF document text
    • https://7c50ec62-1ece-451b-b03c-4788199016cf.filesusr.com/ugd/635f3c_c949b45426964b37991d9a04b8d38ac1.pdf?index=trueIn 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_off0001045a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045A 5112 bytes
SHA-256: 098b734061b8c216c927657d95da304729085ec04c78a2ea8ea2cb8b145bc39a
font_01_sfnt_off000115ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BA 11632 bytes
SHA-256: ba10e360d3cb6895d6498757fb87b2629d9837aec40a8318dce80e05ec9805ea