Malicious PDF — malware analysis report

Static analysis result for SHA-256 530c7bd02580bb7c…

MALICIOUS

PDF

73.9 KB Created: 2021-02-23 06:50:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ab1949261035635594755c6904065750 SHA-1: 7a0286f9b70096f98f9df12fe1b7d17bef106502 SHA-256: 530c7bd02580bb7c80ff33a399f6d651cbb2e4f9c658a02d8a9c65c0187db8a2
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing attempt. It contains an embedded URI that directs the user to a suspicious URL, likely to host a secondary payload or phishing page. The document body, though heavily obfuscated, suggests a technical pretext for the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/strik?utm_term=how+do+you+calculate+maximum+principal+stress PDF link annotation
    • http://sethel.xyz/dufosuvuvabuzojlmfwx.pdfIn PDF document text
    • http://maska-respirator.com/taco_mini_bike_historyxum0p.pdfIn PDF document text
    • http://urolog.xyz/how_to_read_gestures_and_body_languagednaw7.pdfIn PDF document text
    • http://robot3.site/realm_grinder_wiki_research_buildsqyp4o.pdfIn PDF document text
    • http://legendarycraft.ru/how_to_install_vinyl_decals_on_wallsmgx0p.pdfIn PDF document text
    • http://damisidem.22web.org/seterajekito.pdfIn PDF document text
    • http://buloshnaya.site/crash_team_racing_nitro_fueled_characters_spyro31wp8.pdfIn PDF document text
    • http://habirovradik.ru/lepafugr6im.pdfIn PDF document text
    • http://stixlife.info/pejonunavatejo2uilx.pdfIn PDF document text
    • http://damvglaz6.xyz/chain_rule_practice_problemsu9uti.pdfIn PDF document text
    • http://lnstagram-help-businesss.com/barefoot_heart_chapter_summarieso7wrh.pdfIn PDF document text
    • http://ek-arenda.ru/emulsion_polymerization_process9dpgc.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/vefagotoje/84973204262.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/avast_for_windows_8._1.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/new_blouse_design_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/bundeli_bhakti_video_song.pdfIn PDF document text
    • http://virirunabeso.rf.gd/52204142413.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_off0000dd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD68 5440 bytes
SHA-256: ed1ea8e775425eb1eef90f6251e4906d41493d2d38d61d78c58b1265c6975991
font_01_sfnt_off0000efe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE7 12528 bytes
SHA-256: 4c7711aba7f454f0e3feade4d326278c9da9f91d49c8c0d9267be3d260d56149