Malicious PDF — malware analysis report

Static analysis result for SHA-256 48fe33407547e52f…

MALICIOUS

PDF

73.1 KB Created: 2021-02-26 07:43:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 019b84dd6b43db9b80080a4a681add22 SHA-1: 709350b83eb88f7d77b65b16b097e2149dc22fbf SHA-256: 48fe33407547e52ff5d1f221b33f54603314dd09fa9fa0933666c054a77378c0
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wix?keyword=mitchell+high+school+sd PDF link annotation
    • http://vipmanmarket.space/memapo514u4.pdfIn PDF document text
    • https://semuzotefol.weebly.com/uploads/1/3/1/4/131437619/9302f68ffbdbd9.pdfIn PDF document text
    • http://grizhoff.ru/classzone_home_tutor_spanish_3_answers191qq.pdfIn PDF document text
    • https://sivikowililip.weebly.com/uploads/1/3/4/5/134599649/9197948.pdfIn PDF document text
    • https://cdn.sqhk.co/fokofike/3ZEhdgc/sonorobomuzobaxiso.pdfIn PDF document text
    • http://forexgeeks.net/little_red_riding_hood_storyu0pef.pdfIn PDF document text
    • https://cdn.sqhk.co/ketegobuto/gdBieNm/how_to_mix_colors_to_make_yellow_orange.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/tajimipojimo/example_of_reference_sheet_for_interview.pdfIn PDF document text
    • http://nojikigor.myartsonline.com/the_wanderers_where_are_they_now.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/gonusar.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/firur.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/79250108736.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/donedilerufefirolepifasal.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_off0000e25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25C 4900 bytes
SHA-256: b308e7a2ba571314099a423655922e1efa0648b667a52597280065a0bc3a8b1d
font_01_sfnt_off0000f318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF318 10704 bytes
SHA-256: 2d53d68d10575a80637593c9c14d1d86ec34c161f4c5940202ffe4bab8118cdc