Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebda6ab3fb8af2a8…

MALICIOUS

PDF

73.0 KB Created: 2021-03-02 22:03:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7e7de92697e63f226f9ef7579e32f1c3 SHA-1: 2a07ff568f63e8e4d1185b4780e68b858f134d93 SHA-256: ebda6ab3fb8af2a85b035ff6eb2b9ff06d0c59c19273139f9da82d239c6c633c
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/wix?keyword=elements+and+molecules+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479710/normal_601f7f6d98b0a.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/57183429991jyii9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411252/normal_6007102008794.pdfIn PDF document text
    • http://euroshopmn.space/how_to_record_sale_of_asset_in_quickenbes7q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368748/normal_5fc6058e9adc7.pdfIn PDF document text
    • https://rutejiredoratel.weebly.com/uploads/1/3/1/3/131383841/4cdbe7a3448.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/rekawexuretowo/books_free_kindle.pdfIn PDF document text
    • https://s3.amazonaws.com/xulikamul/wuladitimuxuwod.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/haryana_judiciary_exam_2018_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/12812540782.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/51505197297.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/giraxo.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/77141103600.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/thule_bike_rack_hitch_bolt.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/black_and_decker_sanding_sheets_b_q.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/gaderonu.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/sugokerojodar.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_off0000e0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DE 5292 bytes
SHA-256: ded32f1ccd044b74ad936397231f0e2ab1f1db125cbb694e6db6c020bf5fea58
font_01_sfnt_off0000f2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C0 10408 bytes
SHA-256: 39dc784b279f61d159c3559a2e20698a4574c7d4b58da7d5aaeed2e9a66df0e9