Malicious PDF — malware analysis report

Static analysis result for SHA-256 d96bff41cf00e3c0…

MALICIOUS

PDF

86.2 KB Created: 2021-02-02 05:07:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 37a95c72587306335a30f9abb14aca6b SHA-1: 504bd232264cd0863b82889678ee6d629b63f272 SHA-256: d96bff41cf00e3c0c6f1503412aac395ce3ac4ae1a1f3de90382f8f95e1a255c
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/aws?utm_term=brampton+manor+sixth+form+subjects PDF link annotation
    • https://xubemukefanu.weebly.com/uploads/1/3/1/8/131857920/7646117.pdfIn PDF document text
    • https://voloxamofe.weebly.com/uploads/1/3/0/8/130874475/sijufelofibu.pdfIn PDF document text
    • https://cdn.sqhk.co/dodalowogiv/77MhiRw/coloring_pages_for_adults_christmas_ornaments.pdfIn PDF document text
    • http://probmake12.xyz/sofukuvexigesubomorjbwad.pdfIn PDF document text
    • http://verenica.net/1st_rank_raju_full_movie_mp4rhyqd.pdfIn PDF document text
    • http://mestorating.ru/pubinipejeziguzirfs8u.pdfIn PDF document text
    • http://expressday.online/radefamei1qgm.pdfIn PDF document text
    • https://cdn.sqhk.co/fupokiwil/Sgz6jd8/22854282500.pdfIn PDF document text
    • https://gasomuvujutomeb.weebly.com/uploads/1/3/4/3/134356107/7054436.pdfIn PDF document text
    • http://labiosdewonda.com/history_of_islam_in_south_asiauf5qm.pdfIn PDF document text
    • https://cdn.sqhk.co/fejipotegevi/hghjPih/13761223046.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/Eieohdz/sudifupibeluwojo.pdfIn PDF document text
    • http://techanomic.com/wunikuvapirumus6j2wj.pdfIn PDF document text
    • https://vabuxijipureg.weebly.com/uploads/1/3/4/4/134476882/jegusu-pozinozetazak.pdfIn PDF document text
    • https://nobazivikiva.weebly.com/uploads/1/3/0/7/130776215/9062196.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vebenok/lojexomigiv.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/guymon_daily_herald_police_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/43045977499.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F2 5556 bytes
SHA-256: 70c6e44fbb2e9022a754642bfeedad7fb15465d2c64095ca522160a1061e787e
font_01_sfnt_off0000faaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAF 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off00010609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10609 1936 bytes
SHA-256: cf50d13c5c21d2e34fba0d9dd21119d4839fc35fdaebfe62cbacf51850cc328d
font_03_sfnt_off00010f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F48 10772 bytes
SHA-256: b22861803b1ab06d32ea467e07d0a337f81898fa5acb0b1fd86ca1a9608b77e4
font_04_sfnt_off00013443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13443 16544 bytes
SHA-256: 8d45f5f417e74c11d54eaee7138901bb4b2498e40dea16ccf89f2c2707c13e35

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