Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e57b9082eb9aa5…

MALICIOUS

PDF

65.7 KB Created: 2021-01-31 05:32:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bc83f9e8e7d29629cbc575f595b957a9 SHA-1: ec6e9cb73bedcf200045441c0a5d8fb0066922a8 SHA-256: e2e57b9082eb9aa5103b770d2662dcbe4e1ee3bb5cbe63421f08d210db71dcf2
166 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including suspicious links and ML classification. It leverages external URIs and embedded links to redirect users to potentially harmful domains, such as http://com-login8.xyz/nitasalalovxzith.pdf. The presence of these links suggests a phishing or malware distribution attempt, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://maypoin.ru/wb?keyword=tetris%20blitz%20apkpure PDF link annotation
    • https://cdn.sqhk.co/madosodu/sZgebhi/85610176685.pdfIn PDF document text
    • http://youralteragoods.com/75579165194k9ttd.pdfIn PDF document text
    • http://lamovingcompany.com/ninja_warrior_legend_of_adventure_games_mod2wr0v.pdfIn PDF document text
    • http://hamsterbig.com/examen_general_de_orina_gravedad_especfica_1.015hbql7.pdfIn PDF document text
    • http://salearea.pro/animal_shelters_near_me_to_play_with_puppiesdqtp1.pdfIn PDF document text
    • https://cdn.sqhk.co/lusikagidet/sieigcJ/perfect_everything_you_are_to_me.pdfIn PDF document text
    • https://cdn.sqhk.co/zoturisa/iQ0icjj/the_game_master_network_app_download.pdfIn PDF document text
    • http://poverkavoda.website/runetower4qjz.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/jc662rn/alphazero_download_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/beratinuga/qhcjb7L/nobija.pdfIn PDF document text
    • http://itali-big.space/biomass_briquettes_project_report8an3d.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/need_for_speed_rivals_xbox_one_cheatsfg678.pdfIn PDF document text
    • https://cdn.sqhk.co/fonixoligem/gQhdidg/14588204837.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/ePAGaoz/xewobudusabemuwosesekowam.pdfIn PDF document text
    • https://cdn.sqhk.co/makubeku/dgeEKgf/94170600068.pdfIn PDF document text
    • http://com-login8.xyz/nitasalalovxzith.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AA 5016 bytes
SHA-256: fe2fa406b3a729431e20aa2abdcbc1df99549a9069892dcaacc031d2a83c4af2
font_01_sfnt_off0000d5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CD 10980 bytes
SHA-256: 86c6525937c99fd614571d74bd8836fecc5bcaf4ca107945833a47c2483770ad

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