Malicious PDF — malware analysis report

Static analysis result for SHA-256 a43618de1099993e…

MALICIOUS

PDF

66.9 KB Created: 2021-01-28 20:09:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 2d5ccc9d71ed6b5058bcc5caa3621158 SHA-1: 5bd0175654c714a6238a45d9904367b7ac6cfbb1 SHA-256: a43618de1099993ee13f6b659c50c221c9351c6d69d45d00702ab6f388fc6857
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://jacksth.ru/aws?utm_term=adjectif+possessif+french+worksheet PDF link annotation
    • https://cdn.sqhk.co/noxuwitide/hajjbkG/zifevuvedamu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413126/normal_5fe3ee68319f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455370/normal_5feff3d78b05c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420434/normal_5ffbbd63c03ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415527/normal_6009f877d9427.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382790/normal_5fdc83985a626.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485309/normal_5ffbd6caf0200.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490125/normal_6004b7e40542a.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekata/ahcgeUU/marxist_criticism_in_literature.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490274/normal_600f75e4c61b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369782/normal_60118a56d4b2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376099/normal_5febea2578f1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_600a1c9be583c.pdfIn PDF document text
    • https://cdn.sqhk.co/mowukirew/HnggRix/lovemikekukomexire.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417525/normal_5fecce8b27a40.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://redebalumu.rf.gd/18726987791.pdfIn PDF document text
    • http://bakotege.rf.gd/95063493084.pdfIn PDF document text
    • http://zexukojol.rf.gd/hp_laptop_wireless_adapter_driver.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_off0000c66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC66A 5224 bytes
SHA-256: 71d46eb36368145334a53cc6a69934d5e65056629c7ee4f8a438447c663b4696
font_01_sfnt_off0000d84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84A 11732 bytes
SHA-256: 5b3a61c9aaedfb82a6ace7d77eb9b44b6d6c84a8586181b351c5e3d179fc34cd