Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c5bdf1001d284bf…

MALICIOUS

PDF

70.1 KB Created: 2021-03-02 12:25:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ff67f679651ab943fe768adde334097a SHA-1: b5a8716f8dc81cec40d3c603b20b6fb632e1d77f SHA-256: 3c5bdf1001d284bf10435c228807cbd51ac2830e2ca7c38c3b4e37132a101c3a
254 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
  • 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/wix?keyword=playhome+celebrity+cards In PDF document text
    • http://lomigakorak.getenjoyment.net/what_does_pyramid_head_represent_in_silent_hill.pdfIn PDF document text
    • https://dagigofeno.weebly.com/uploads/1/3/4/8/134887245/6722589.pdfIn PDF document text
    • http://lujadexezusunam.22web.org/jegakubonemesudopupinizi.pdfIn PDF document text
    • https://tagipuzato.weebly.com/uploads/1/3/0/7/130776724/rafavovipazasa-xenoseduge-lunuzojagusiwel.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/sikuva/south_african_house_music_free_sites.pdfIn PDF document text
    • http://somaxowirotiko.rf.gd/latest_cg_song.pdfIn PDF document text
    • http://zibarubo.epizy.com/menate.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/zedopopifex.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/tutorip.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/sovezutakiwunixivifiwef.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/sales_manager_cv.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/zurupovusefe.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/bobrick_ada_restroom_guide.pdfIn PDF document text
    • http://rinejifivazori.epizy.com/62766013473.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/28022700525.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_off0000c90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90E 5104 bytes
SHA-256: de9c2b45020c272409bb841ba408cfea0a88c01cdab7733dca004a573cf43501
font_01_sfnt_off0000da65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA65 10040 bytes
SHA-256: c82faaa07459adfb21b3186018fc644392eb77709b8392003406719c5e146c93
font_02_sfnt_off0000fcde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDE 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c