Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa737e2793f4c56…

MALICIOUS

PDF

74.4 KB Created: 2021-02-28 02:31:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a5c7e7e50ad0b92a3ed2a7d05fca9c65 SHA-1: 18373206b70bc4f1042ebf10e0a49d08fb6dfd8f SHA-256: daa737e2793f4c562ca4a905432078d1e57a68fb81d610c12ab02b4b69523ed3
196 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
  • 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://jacksth.ru/award?keyword=zebra+qln220+battery+life PDF link annotation
    • https://cdn.sqhk.co/wekaradukuve/aji3Dgi/jiropez.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/elzgef0/93378665799.pdfIn PDF document text
    • https://cdn.sqhk.co/gunumiku/aHDALvg/feviz.pdfIn PDF document text
    • https://cdn.sqhk.co/nofoxanu/bihgesz/monthly_budget_planner_daily_expense_tracker.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/iCUjbif/wecom_apple_app_store.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387711/normal_60362b8d3ab2e.pdfIn PDF document text
    • https://xoredanixeg.weebly.com/uploads/1/3/0/8/130814516/0b58d8bcfa4f0de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495257/normal_6026dbd70c9c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408346/normal_5fff22749ccba.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/lg_air_conditioner_error_code_ch_10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476434/normal_5fee3f714111d.pdfIn PDF document text
    • https://nemabofafuz.weebly.com/uploads/1/3/5/3/135389169/ragenafafez_luxuvin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452372/normal_5ff31b7035859.pdfIn PDF document text
    • https://zekorawuj.weebly.com/uploads/1/3/4/8/134862422/zadazaje.pdfIn PDF document text
    • https://cdn.sqhk.co/libegavezu/icotnii/rope_ninja_frog_apk.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_off0000e796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE796 5180 bytes
SHA-256: e2892da444f59412c25cd0db8a1809da701d81e45879fc1c23a0c10661066111
font_01_sfnt_off0000f958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF958 10456 bytes
SHA-256: 3fac9e95ab994f2bb5086717f080fb47f933f3bb1c21e11f9594b55dcf920a87