Malicious PDF — malware analysis report

Static analysis result for SHA-256 611b72d1d0059376…

MALICIOUS

PDF

65.4 KB Created: 2021-02-16 09:16:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8a92db30f09aeb94f49bd264fc70790b SHA-1: 257242baf13ba069f173d63d3aacb03e9f855ee4 SHA-256: 611b72d1d0059376845cd5636bffdc3de23267e554c1adf80ce45d3976f82a43
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=classzone+virtual+blood+typing+lab+answers PDF link annotation
    • https://cdn.sqhk.co/jutigurotow/YSjhivR/life_simulator_apps_mod_apk_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368246/normal_5fcc839de4d13.pdfIn PDF document text
    • https://cdn.sqhk.co/folamudoj/haAIPOM/8142391667.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385848/normal_5fee69cbb3aa2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_600c0f286a4b3.pdfIn PDF document text
    • https://cdn.sqhk.co/zujarepifej/hghwiMT/95210708578.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469106/normal_5ff79df348c63.pdfIn PDF document text
    • http://supijijuzumapiz.iblogger.org/tutinuberokururek.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/faluzotixupi/believe_polar_express_piano_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/20668416978.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/installer_android_studio_sous_ubuntu_18._04.pdfIn PDF document text
    • http://gadusevi.rf.gd/child_protection_policy_template.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/bitolewajaparepe.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/3938193603.pdfIn PDF document text
    • http://fujuresaw.epizy.com/tuberous_sclerosis_treatment_guidelines.pdfIn PDF document text
    • http://midejoxujonaler.rf.gd/frp_bypass_apk_file_free.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_off0000c33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC33A 5476 bytes
SHA-256: 20e29bb74da10da8cb1faa1b68c35ec79c404128237c65e17dabdddc068230c8
font_01_sfnt_off0000d600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD600 10000 bytes
SHA-256: 5126350be02466e2689212691f3c15528ba6d65cabe07cc5372724e2f78c5f83