Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59cc7883351c906…

MALICIOUS

PDF

63.6 KB Created: 2021-03-03 21:48:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1e038aa3d9608f1e6a4cb5a7d27b6c32 SHA-1: 6b495a80f166494a87ac248f591136d12ff12d29 SHA-256: a59cc7883351c90688fc5635b99854d2347970da0c8779c42c7d0da7d5df60ef
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://maypoin.ru/wb?keyword=what%20is%20an%20equus%20in%20science PDF link annotation
    • https://kokujefep.weebly.com/uploads/1/3/1/4/131409677/7e40d38ca.pdfIn PDF document text
    • https://vuvonuzomuvi.weebly.com/uploads/1/3/4/5/134508102/zedazalelar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490251/normal_5fe2c91f2e646.pdfIn PDF document text
    • https://jeduwenerapowi.weebly.com/uploads/1/3/4/6/134678879/viwujakuxowiwev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488806/normal_6004f1e6df28c.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/jahbhew/throne_of_glass_series_characters.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454420/normal_5ff3e9483aa74.pdfIn PDF document text
    • https://lezanixopedem.weebly.com/uploads/1/3/4/8/134886347/borite.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/iiaHgjD/25769831928.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422620/normal_5ffd205d8fb15.pdfIn PDF document text
    • https://cdn.sqhk.co/ribafesupuro/jh6ggha/rowogomadomexuk.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/eEggheR/follow_manager_for_free_installation.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387230/normal_5feb064d0fefe.pdfIn PDF document text
    • https://cdn.sqhk.co/vutenugade/i9gg6hd/sirujamiludekokitodamim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470220/normal_60207bcee0802.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/Shehaij/cthulhu_wars_factions.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/risalenefazozo/misibukipogubokisuto.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/39695205402.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_off0000c193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC193 4896 bytes
SHA-256: 33b94ea955371f63aba9b779b051c4318ae163fb44714ef3fb314d0d45a6ba6c
font_01_sfnt_off0000d24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24E 9124 bytes
SHA-256: 83760c5b006f647d74d2e4485a0118955b074cff1f51cc40a2b43b8e45a72d43

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