Malicious PDF — malware analysis report

Static analysis result for SHA-256 33d9fa9d7378371b…

MALICIOUS

PDF

74.3 KB Created: 2021-02-25 05:33:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bfb73a263c3367d643ca55b7d4d0ae2c SHA-1: 67f8504d5458965d06210351b27078496faa33b0 SHA-256: 33d9fa9d7378371bc307c2aca8f33dffce75bca516f51f0adb03b39cd85abe4a
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wb?keyword=denon%20dcd-685%20service%20manual PDF link annotation
    • http://nageramuvepom.mywebcommunity.org/how_fast_can_a_rzr_170_go.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/how_to_install_adobe_acrobat_pro_dc_on_a_second_computer.pdfIn PDF document text
    • https://bogogumufen.weebly.com/uploads/1/3/4/0/134018830/8d672.pdfIn PDF document text
    • https://sifejolo.weebly.com/uploads/1/3/1/4/131410009/e92e8c0f6a.pdfIn PDF document text
    • https://tedifonag.weebly.com/uploads/1/3/1/1/131164063/jefomoli_gugavi_xobafupewo.pdfIn PDF document text
    • https://kazofinuso.weebly.com/uploads/1/3/4/3/134369681/remufajadomipi.pdfIn PDF document text
    • https://tejukazirinari.weebly.com/uploads/1/3/1/3/131398521/2093489.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/what_makes_an_argument_valid_in_logic.pdfIn PDF document text
    • http://ca-management.website/interpersonal_communication_kory_floyd_3rd_editionve4jr.pdfIn PDF document text
    • https://fuxoneji.weebly.com/uploads/1/3/1/4/131437311/nureloba.pdfIn PDF document text
    • https://gomarevijupa.weebly.com/uploads/1/3/4/5/134585171/mizitasu.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/minaxigevani/is_the_drug_king_based_on_a_true_story.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/dewetozazereroxapidur.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/spotify_mod_apk_revdl.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/catalyst_9500_mpls_configuration_guide.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_off0000e1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F5 5648 bytes
SHA-256: 4cf59f4130a33eb7dc72878adb485b6cedc7ec9b9b544dab9d51adc3e78d3345
font_01_sfnt_off0000f521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF521 11396 bytes
SHA-256: 9cf1558f62977272b8349dac5e75a4a48ceb5d789ab638661baad094ddc68869

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