Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d9a33de54a675de…

MALICIOUS

PDF

87.7 KB Created: 2021-05-15 00:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ee2614c5bf2fb018089f3698a9cbe638 SHA-1: a8432d19149f1cc35e11ab9a6ead7ff14b6c59da SHA-256: 1d9a33de54a675de8d54b2a8f394f84f1c5d14e3d3517cdc9ff6d6959ee99c24
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. A critical heuristic identified a 'Clipboard command execution lure,' indicating the document instructs users to copy and paste content into a shell, a common technique for executing malicious commands. The presence of external URIs further supports the likelihood of payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xezojetit.ru/strik?utm_term=how+to+use+linux+commands+on+mac PDF link annotation
    • https://tatonipek.weebly.com/uploads/1/3/4/8/134874136/a5035bd9.pdfIn PDF document text
    • http://tapikujub.22web.org/kunimik.pdfIn PDF document text
    • http://vamofawevized.22web.org/abnormal_psychology_17th.pdfIn PDF document text
    • http://herss.space/puzatorogabasal5i214.pdfIn PDF document text
    • https://gukevejulolun.weebly.com/uploads/1/3/2/3/132302942/kixelojimin.pdfIn PDF document text
    • http://winoorama.site/majesinizu05jv8.pdfIn PDF document text
    • https://buvaranugabenu.weebly.com/uploads/1/3/0/8/130873820/c63c333576cab.pdfIn PDF document text
    • https://zazoveju.weebly.com/uploads/1/3/1/4/131407355/8717103.pdfIn PDF document text
    • http://fitatuvepejozo.sportsontheweb.net/bengali_books_online_free.pdfIn PDF document text
    • http://lojasamericanasbr.com/apostila_para_aprender_a_desenhar_mangve41i.pdfIn PDF document text
    • http://edapog.online/ganoluteperap6dmh.pdfIn PDF document text
    • http://gonzo-3d.com/the_buried_mirror_ebook80jid.pdfIn PDF document text
    • http://xobokalute.iblogger.org/kokuk.pdfIn PDF document text
    • http://zitupow.medianewsonline.com/avancemos_1_textbook_answers.pdfIn PDF document text
    • http://jesibijifinuz.mywebcommunity.org/chronicle_of_a_death_foretold_themes.pdfIn PDF document text
    • https://tefegepivovopuf.weebly.com/uploads/1/3/5/3/135311357/zinelepibam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mipalex.rf.gd/memoria_arquitectura_de_computadoras.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcadf96a-d257-4e31-867d-52c9415066b7/37853009408.pdfIn PDF document text
    • http://vukevigax.epizy.com/vaste_song_ringtone_bestwap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cbdea82-e7b5-4161-b12d-50b82f84694b/sap_wms_training_online.pdfIn PDF document text
    • http://zeledevunetoxow.rf.gd/49957843211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/867bebc3-820d-4d1f-aa15-04980e95c2cf/rujetafabexatef.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11043 5112 bytes
SHA-256: 3b9bb43616b053eee66cc93ba2f09ca83f643a75096f2aca428f4a472cde079a
font_01_sfnt_off0001219c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219C 1936 bytes
SHA-256: cf50d13c5c21d2e34fba0d9dd21119d4839fc35fdaebfe62cbacf51850cc328d
font_02_sfnt_off00012adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADB 11224 bytes
SHA-256: 92e83b9c6cdbc0ac769e1df570d2fba90dff1431ab32a9ee39bf1f8f06ce2fb2

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