Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f3728a51a9b245b…

MALICIOUS

PDF

66.0 KB Created: 2021-03-07 20:00:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 186b1a29e68e287949e6a109ba025f07 SHA-1: 59606c42fdc696dff3a75425be550eef44dd04d7 SHA-256: 0f3728a51a9b245b99cda2bd64ba04c44aae13431f8f1daf9e4ca16c25dce607
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain. ClamAV and an ML classifier flagged this PDF as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text that appears to be a title and authoring application, suggesting a lure. The presence of an external URI and the high confidence scores from detection engines indicate a malicious intent to redirect the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/strik?utm_term=scorch+trials+book+trailer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5fe8271530328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484834/normal_600b699b6e0c6.pdfIn PDF document text
    • https://cdn.sqhk.co/vapezuwe/7EgjfJN/alone_season_6_jordan_now.pdfIn PDF document text
    • https://cdn.sqhk.co/kekagate/gcCqgqb/princess_colouring_book_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/iWMhdW5/ludo_king_hack_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vamunidibu/uhhidpU/59717251527.pdfIn PDF document text
    • https://cdn.sqhk.co/gixekoji/icjfHib/find_snapchat_friends_by_number.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/how_to_replace_water_filter_in_ge_fridge_mwf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4859805/normal_603554c9370b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404512/normal_5fef139c34c8b.pdfIn PDF document text
    • https://cdn.sqhk.co/fexilejedit/MPVhbdI/cuisinart_knife_set_with_sharpener.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384029/normal_6006ef9db134b.pdfIn PDF document text
    • https://cdn.sqhk.co/mosepoxik/giggNjb/song_sheltered_in_the_arms_of_god_lyrics.pdfIn PDF document text
    • http://rumigiwataj.getenjoyment.net/how_to_descale_a_cuisinart_keurig_coffee_maker.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/kevava/furofofosoxipalomilek.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/inspection_report_template_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/jukog.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/napibuzivutapolanujiperuv.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/povapobaju.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/pontoon_boat_trailer_guide_bunks.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/japazoturagodomopowevif.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_off0000c606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC606 5196 bytes
SHA-256: 4cd1e923fe1a8951603bed5abbf2dfd4209e6254aa41e236a1e630dfbe613179
font_01_sfnt_off0000d7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A8 10316 bytes
SHA-256: 8062b991d81d6f62fc7704035bdb8d51f46a2f2ea328807877090119908a1840

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