Malicious PDF — malware analysis report

Static analysis result for SHA-256 873cbee86ae192ec…

MALICIOUS

PDF

72.4 KB Created: 2021-03-01 17:12:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fabe680fd9a8b36b3787ae6906355c99 SHA-1: e5c131dedea5f9aa8fd4e4572b85774a068e06f3 SHA-256: 873cbee86ae192ecb34b81f57647bbf58ceea19236f2f392a535dfd11bd87165
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/award?keyword=quran+english+translation+download+pdf PDF link annotation
    • http://yyyyyyhhhhh.space/fasawigufumukwgnz8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387430/normal_600cc352ba1a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390052/normal_5ff77aacf17be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484821/normal_601338bccdb7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462982/normal_600aa101f237c.pdfIn PDF document text
    • http://copyrightsupport-ig.com/what_is_macbeth_thinking_act_1_scene_39w2jj.pdfIn PDF document text
    • http://skout.tech/tipos_de_investigacion_descriptiva_segun_autoreseyx6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498992/normal_5fc7c9da87a9c.pdfIn PDF document text
    • https://cdn.sqhk.co/vumusokutil/Gieiagg/74491404480.pdfIn PDF document text
    • http://d2-club.ru/diduzojin9yew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501482/normal_5fc647b2d967e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413226/normal_5fea46a2a4c94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375076/normal_5ffb66a095ddd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481059/normal_5fc9925013d05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390068/normal_6023c044c5e26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469359/normal_603137aad7286.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_off0000de64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE64 5456 bytes
SHA-256: b22a07c59de79e684047b011763b9741fa521ae4ed28e76029bd404c67eaa2a6
font_01_sfnt_off0000f0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FD 10420 bytes
SHA-256: 91eda96ee08b3c7e2e4772383628e2f365a9c5b02e6609959d8550854941d0eb