Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff20c105571aa0e…

MALICIOUS

PDF

74.4 KB Created: 2021-02-23 13:48:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 55ca40ec5d187a244f000a7d6520d3bb SHA-1: 6d49cce1b5d46af3d11088fdda3eb513426427f9 SHA-256: 3ff20c105571aa0e3be98912d15747ec12e95dd92a6472836157937abd93ec36
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/wix?keyword=human+anatomy+laboratory+manual PDF link annotation
    • https://cdn.sqhk.co/nudofarus/iTiajdd/93109824535.pdfIn PDF document text
    • http://localdesign.me/motu_aur_patlu_ki_jodi_karedfhbv.pdfIn PDF document text
    • https://cdn.sqhk.co/gagowuname/iesCgfq/samsung_galaxy_s3_live_wallpaper_hd_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nenoserod/iiGgiGd/9003819239.pdfIn PDF document text
    • https://cdn.sqhk.co/fovulifavu/gciihgc/592504913.pdfIn PDF document text
    • http://1green.space/47837505418osjc8.pdfIn PDF document text
    • https://cdn.sqhk.co/motulobugaji/riaMxhj/49607521472.pdfIn PDF document text
    • https://cdn.sqhk.co/tononapiwaso/giaF80z/duwigokadilidiguderode.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480905/normal_60075f0425aba.pdfIn PDF document text
    • http://shop-profildoors.ru/perfect_piano_game_y8qmkzh.pdfIn PDF document text
    • https://cdn.sqhk.co/famuxina/goaibep/geek_smarter_shopping.pdfIn PDF document text
    • https://cdn.sqhk.co/wazuzofi/gd3MibT/ripifoxitopatazatowunala.pdfIn PDF document text
    • http://frankiearvelo.com/radio_skyrock_fm_parisu7g3u.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/jdhhdbs/wallpaper_hd_liverpool.pdfIn PDF document text
    • https://cdn.sqhk.co/gidagolusi/iE9tjd2/kusafo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AB 4856 bytes
SHA-256: 971dc00b868eaf031a28d61af4410b521204c1200d25d0b75a1f29394b6e3367
font_01_sfnt_off0000f918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF918 10492 bytes
SHA-256: 464c575c16c6aa298de18b71cb61b32ff38c2e394e558b89014c9212a76eb743