Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a3ab7d53ffe4ef…

MALICIOUS

PDF

77.4 KB Created: 2021-02-13 02:38:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 63b88fdff5e785e87fbbc3ab8060cda1 SHA-1: 892dd04c3315df5ba59659b6bbd18d490073e39b SHA-256: 37a3ab7d53ffe4ef0a56a91ee450083e57f6d9794d1f84ca0e3ef6ef002bac80
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/wb?keyword=greeting%20card%20template%20word%202016 In PDF document text
    • http://lefavapexusa.iblogger.org/74868390236.pdfIn PDF document text
    • https://radisowe.weebly.com/uploads/1/3/4/3/134366404/8174415.pdfIn PDF document text
    • http://mitipevebedo.iblogger.org/apsacs_date_sheet_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479904/normal_5fd167258c34c.pdfIn PDF document text
    • https://rimuzunij.weebly.com/uploads/1/3/4/0/134095873/xegogemo_rokodat_ronuli_fafosi.pdfIn PDF document text
    • https://gezivotad.weebly.com/uploads/1/3/5/9/135963035/4560387.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/wewuxuviwar/banner_template_svg.pdfIn PDF document text
    • http://bozalusi.epizy.com/nisudaz.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/18275433443.pdfIn PDF document text
    • http://luzawuwu.epizy.com/wps_connect_app_free.pdfIn PDF document text
    • http://junedujivoxoz.epizy.com/assurity_pacemaker_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/mixosasugijekep.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/cengage_organic_chemistry.pdfIn PDF document text
    • http://tasukifuputuf.epizy.com/bpm_ka_full_form_kya_hota_hai.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/angry_birds_transformers_apk_mod_gems.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_off0000f241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF241 5816 bytes
SHA-256: 0977846d7918ec6132b1975a52706f7bbc49fa721f57edb3f373d3760e5097fc
font_01_sfnt_off00010616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10616 10048 bytes
SHA-256: 60e838e9e3b377aa5bbe4b22fb71ca84f8b634e75d83dcb8c220a87a31c70d78