Malicious PDF — malware analysis report

Static analysis result for SHA-256 c22e59fb90bc48e6…

MALICIOUS

PDF

78.8 KB Created: 2021-04-15 05:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ecfcebdaefd43d66ee86593bfc108e81 SHA-1: 2910570a8d7c65d0d0d3e6124fcdef66234f01fe SHA-256: c22e59fb90bc48e66d26e8656b4b4bb26b9e5b2e2360236b2c1936db8183bdb4
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics identified numerous external URIs and a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=inglourious+basterds+chapter+1+analysis PDF link annotation
    • http://kvyovk.xyz/vsco_cam_filter_guideup06h.pdfIn PDF document text
    • http://xusetelokumupoz.iblogger.org/imovie_mac_tutorial_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/samanugutu/4jaiige/petroleum_engineering_jobs_in_south_africa.pdfIn PDF document text
    • https://dofidosuxemaxej.weebly.com/uploads/1/3/4/5/134595751/6584349.pdfIn PDF document text
    • https://kilavolofijon.weebly.com/uploads/1/3/1/1/131164174/da97c70faf.pdfIn PDF document text
    • http://uchebnoe.website/bartenders_guide_to_the_galaxyhip0v.pdfIn PDF document text
    • https://kizubunutasi.weebly.com/uploads/1/3/5/3/135348794/45b6bd3ca.pdfIn PDF document text
    • https://cdn.sqhk.co/musarawaw/7uF7jeK/pinutabugiz.pdfIn PDF document text
    • https://cdn.sqhk.co/wixumenez/rGa9lgf/best_country_music_singers_2020.pdfIn PDF document text
    • http://vekvelo.ru/my_bloody_valentine_movie_1981_parents_guide8lz09.pdfIn PDF document text
    • https://cdn.sqhk.co/xenekifa/Xiihe17/ducks_donuts_jacksonville_nc.pdfIn PDF document text
    • http://mailedflkf.site/833753270911ivcu.pdfIn PDF document text
    • https://cdn.sqhk.co/rukububibon/Iib8lhf/block_sudoku_download.pdfIn PDF document text
    • https://roxasudafuj.weebly.com/uploads/1/3/0/7/130740166/kuzuwofedodom_vekulek_kodusojubapex.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/wezukep/caterpillar_428_backhoe_manual.pdfIn PDF document text
    • http://bugutanokunaliv.rf.gd/azimuth_angle_calculation.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/zelda_ocarina_flute_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/funes_el_memorioso_anlisis_filosfico.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/cloud_platform-_as-_a-_service_market.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_off0000f639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF639 5568 bytes
SHA-256: c81b550ede4686d48b9d9fded44e5946887f07c46692e0ddf93dc08c06c68cd4
font_01_sfnt_off00010927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10927 10772 bytes
SHA-256: cd1b69d4f92a2532dfdba10ae90f203e27e49055a976ee4f8ae67a254180f4a4

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