Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce3da889286ad35…

MALICIOUS

PDF

68.8 KB Created: 2021-03-10 15:10:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 822c701055ca4b5d0a31c0edd1da3b39 SHA-1: e232b7277f1aeccdf3ca624bddbbc2d5950bc73f SHA-256: 4ce3da889286ad358251877d19c6f896195606d3ec4db1bebfd6390a2900a13c
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://zajinet.ru/award?keyword=cessna+421+service+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/lebereme/dnDchhZ/ekattor_school_management_system_wordpress_plugin.pdfIn PDF document text
    • https://cdn.sqhk.co/mupijuwo/5hdCBio/suwezaduwabadolure.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/hEhe315/e_wallet_account_registration.pdfIn PDF document text
    • https://lopazilavorelid.weebly.com/uploads/1/3/4/0/134097689/xukegupop.pdfIn PDF document text
    • https://cdn.sqhk.co/lebudawojafi/jhjjIhd/ebay_zero_bid_finder.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/jyibFvq/29809115704.pdfIn PDF document text
    • https://gesamuju.weebly.com/uploads/1/3/1/4/131453574/7cb05bdc478.pdfIn PDF document text
    • https://tagipuzato.weebly.com/uploads/1/3/0/7/130776724/7940792.pdfIn PDF document text
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/faluganoxugifiru.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/xijuxosisomuna/how_to_learn_coding_for_free_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/aeroplane_game_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/logitech_x-530_5.1_soundsystem_treiber_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/availing_form_definition.pdfIn PDF document text
    • https://29bb9f0a-cb36-4278-8b1c-05d86a2267e4.filesusr.com/ugd/25e746_ce2a6451c0d9495da47118e69da6694f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ddf677-a3b6-4f4a-881e-fc397317e4ab/93682612224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f686d7ff-f6c6-4ad3-a784-e68a27cdbceb/26071804478.pdfIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_4cb77fa6f4324fcf99e46635ccda3f1f.pdf?index=trueIn PDF document text
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_e80a0adb76ef434fac3d2fa3b6fc528e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/505dc4f2-13ce-43cc-a7be-ebc5bf78fcea/mojidunowuli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04517974-9868-45e4-89e6-9d2dde3c2a7a/7354974574.pdfIn PDF document text
    • https://61090d85-22e6-4724-b969-52a17785150c.filesusr.com/ugd/952c2e_2b5f51c380734bc18efc0ba2e3055912.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/falufusu/63532594534.pdfIn PDF document text
    • https://39c10a3a-92c6-412a-a1bb-b8a1fc48fbc4.filesusr.com/ugd/259099_674eb026900b4852aa5add61dd9d1eb8.pdf?index=trueIn 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_off0000d133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD133 5540 bytes
SHA-256: fbd71a31e8bb4007e44a3b6287977793958f537d9c2fd66a32ee3ff3c8f45fb2
font_01_sfnt_off0000e404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE404 9792 bytes
SHA-256: ed1b007a70e8d4066b60f2fa5ed9a702143604afb8e621a4b10c75b64950c102

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