Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4d741bf41fe087…

MALICIOUS

PDF

73.2 KB Created: 2021-02-23 20:32:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8bfcd127f53e067206af00a39613b849 SHA-1: a1964f66de834ce8199b02c4b15b705fbc3f7240 SHA-256: 1c4d741bf41fe087fa7a6797d8811643df9ae211227181e4f43073a5c15fa654
196 Risk Score

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/wix?keyword=definition+of+terms+in+research+paper+about+bullying PDF link annotation
    • https://lezuzanufebaj.weebly.com/uploads/1/3/4/8/134873312/diwatodokuxikaraji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388289/normal_6022d8e7b65aa.pdfIn PDF document text
    • https://didaripetog.weebly.com/uploads/1/3/4/6/134685212/268487.pdfIn PDF document text
    • https://fetezubusob.weebly.com/uploads/1/3/2/6/132681625/6185439.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413563/normal_60020fca34674.pdfIn PDF document text
    • https://kodidenub.weebly.com/uploads/1/3/4/3/134328035/guxiloki.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/vhiibgf/how_to_get_free_baby_bottle_samples.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413008/normal_5fda848f811ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kewakuko/15078490592.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/xegurulegazemopimov.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/proform_cardio_hiit_elliptical_cross_trainer.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/street_fighter_3d_game_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/car_coloring_sheets_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/75259193526.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/99383195912.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD482 5552 bytes
SHA-256: 0faa5c0b8a53a21d649d1039cef3ebcf8c715f15b3ddf72250d70399bf3c781a
font_01_sfnt_off0000e73e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73E 9856 bytes
SHA-256: 7eac73e18bff8c37c3971a8a47a92323d48e4c4f9637cf42056f8608a8843fdc
font_02_sfnt_off00010904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10904 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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