Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d9cc63686876a76…

MALICIOUS

PDF

76.8 KB Created: 2021-04-03 07:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c1b611dcdce6cb62cd141618c5bbeff9 SHA-1: a89e61d35ed01fd9e05e83f21941438a3301e9c7 SHA-256: 6d9cc63686876a7610168f2a6d0678b5c37965fabc4471149451e6f5d533ddff
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable hosting and acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

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://mezovuduw.ru/strik?utm_term=data+warehouse+examples+dimensions PDF link annotation
    • http://lulikike.iblogger.org/moore_mccabe_and_craig_-_introduction_to_the_practice_of_statistics_8th_ed.pdfIn PDF document text
    • http://rabusog.22web.org/fubeposaxazat.pdfIn PDF document text
    • http://punegasu.22web.org/saint_saens_swan_piano_sheet_music.pdfIn PDF document text
    • http://galubiwigo.iblogger.org/54800821125.pdfIn PDF document text
    • http://rebabusega.iblogger.org/how_to_transfer_from_celtx_to_final_draft.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vivefisapef.epizy.com/netflix_movies_file_location.pdfIn PDF document text
    • http://piwuzodoxomox.epizy.com/99586352740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf0b1540-9343-46b7-a2ee-7df1fc4d6b5d/batman_beyond_comics_read_online.pdfIn PDF document text
    • http://guzeberipavol.rf.gd/tevamutex.pdfIn PDF document text
    • http://kixasudasiwub.epizy.com/41967777907.pdfIn PDF document text
    • http://rajafidaforuzav.epizy.com/les_automate_programmable_industriel.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/94778453184.pdfIn PDF document text
    • http://jesowafifu.rf.gd/ndebele_orthography.pdfIn PDF document text
    • http://kojeziponoduv.epizy.com/waxafizojapara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8fd199b-cd15-44cc-b5bf-59972834474b/steins_gate_ending_explanation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7af8a40d-5f28-4972-aaa9-dc0f39fa61fd/rawak.pdfIn PDF document text
    • http://robumesexix.rf.gd/biological_perspective_psychology.pdfIn PDF document text
    • http://xozelabudizi.epizy.com/korut.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/us_army_white_paper_example.pdfIn PDF document text
    • http://wajodojizofe.epizy.com/languidece_que_significa.pdfIn PDF document text
    • http://xojakejib.epizy.com/soniredixutik.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_off0000e442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE442 5240 bytes
SHA-256: dc1441788f6bafb5d4355517d5c6cb1515cbac477ccefebf10fe9c016e360d0d
font_01_sfnt_off0000f602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF602 9836 bytes
SHA-256: 38d15af7b4deab5e5585d8f3d7a38092d9171c86b0c9ce6722905a71087c22b3
font_02_sfnt_off00011797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11797 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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