Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e4caa225b41d28…

MALICIOUS

PDF

73.6 KB Created: 2021-05-17 10:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 420d144b199be37bf11b8b3d3885e077 SHA-1: 2ba034b42df9314fc799c8b11a2e901d08054f21 SHA-256: 75e4caa225b41d287b0e71259dbe4d28b49151fabdb0ed964f4be69eed27bd0f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/strik?utm_term=how+to+make+6+figures+without+degree PDF link annotation
    • http://sofebitaxed.iblogger.org/barron_s_6_gre_practice_tests_free.pdfIn PDF document text
    • http://sevibifodome.getenjoyment.net/boiler_maintenance_handbook.pdfIn PDF document text
    • http://deviditiposu.iblogger.org/sama_veda_malayalam_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/hgdfuig/wejizipo.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/Vc5jfij/piano_music_maker_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/jhvtieP/aloo_tikki_video.pdfIn PDF document text
    • https://cdn.sqhk.co/komagiju/iijgpge/angularjs_2._0_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/hgehghe/throne_chairs_for_sale_atlanta.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/50860244970.pdfIn PDF document text
    • http://favarivizuna.medianewsonline.com/xukejawopi.pdfIn PDF document text
    • https://cdn.sqhk.co/kesavaki/cQfRJgc/jadagiresekoravi.pdfIn PDF document text
    • https://cdn.sqhk.co/fatifofab/e1tijOU/pogiraxovobajoxaxeredo.pdfIn PDF document text
    • https://cdn.sqhk.co/gijesali/jfibjb1/20486789618.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/ae468dff-2346-45e7-bca4-2901ca4fe731/88845863705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5e92052-b4f1-4407-b8e3-87617dc1bc2e/sadagivife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcc48b76-ba5c-4688-98af-f31b2862ef7e/smallest_gps_tracking_device_for_cats.pdfIn PDF document text
    • http://kirigawegugava.epizy.com/zefoded.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8440a11-6db1-4a5d-a6ae-ff2f2c3520ba/damafetusuwerepogadurovin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83684353-7f02-41ff-ae2d-d3a5774ea739/crown_xti_4002_troubleshooting.pdfIn PDF document text
    • http://botawaxugeb.epizy.com/bergey_s_manual_volume_4.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_off0000e339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE339 5560 bytes
SHA-256: cbb61e0c4603d2b16da91b811fd3f33b5293f3d39cf7c943537279c94bd0ad3f
font_01_sfnt_off0000f60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60A 10504 bytes
SHA-256: 27f2c2e39fd58748a915ca48a09b428625019ba8129daea23140bac81eabbcac

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