Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a185385a8d275d…

MALICIOUS

PDF

63.3 KB Created: 2021-02-16 18:35:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c02d4a635a2b0c076a0a29098eb074a9 SHA-1: 78b999359c24ed9e04cc165cbdc399f65b4c27e4 SHA-256: d5a185385a8d275dcd4eddf805a0e6df8cffd994624d317e43b6890585216201
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=wordly+wise+book+7+lesson+9+pdf In PDF document text
    • https://farenutatovepo.weebly.com/uploads/1/3/4/5/134502273/jaxedavotizoxem-xurebijoxi.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/9IWmjdw/17361302356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495536/normal_6014ba7e3b3d7.pdfIn PDF document text
    • http://evgeniy-semenenko.ru/39905097552m45uj.pdfIn PDF document text
    • https://cdn.sqhk.co/mitejapeki/lgdhfYx/kegopevasuratifur.pdfIn PDF document text
    • http://parrrtner.xyz/informant_meaning_synonymc94uo.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/jjjieoU/19467024896.pdfIn PDF document text
    • https://lovelutunaguj.weebly.com/uploads/1/3/4/7/134735325/jelatetopatab.pdfIn PDF document text
    • https://boxorefo.weebly.com/uploads/1/3/0/9/130969922/9412400.pdfIn PDF document text
    • https://vogoniboka.weebly.com/uploads/1/3/1/0/131070279/8286297.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489422/normal_5fe5f605f03c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408601/normal_5fc71bfcb24a0.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/Jhdhiih/5858488705.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/bokofapig/ap_calculus_ab_review_packet.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/46408305603.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/fishing_report_orange_beach_alabama.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/dabuvof.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/jowituzoraborovej.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_off0000be0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE0E 5472 bytes
SHA-256: 7ce2913a083def3193bf482217ad5f83416b266e8d66fcadb400685b9627e014
font_01_sfnt_off0000d0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DA 9104 bytes
SHA-256: 9096962f988ba290deabc8c56187f3d180736bd31250582f9ca55890799d8510

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