Malicious PDF — malware analysis report

Static analysis result for SHA-256 81f878d46345a615…

MALICIOUS

PDF

73.5 KB Created: 2021-02-09 00:24:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7777ac85445cf1b0ffbe3bddadd92148 SHA-1: b337f4eb6a6ea29a0d950bb99131ec987f123446 SHA-256: 81f878d46345a615918d021ac820f6a88b284ce63d3a1a345a0db421678060fa
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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://leonvi.ru/wb?keyword=lamma%20island%20restaurant%20guide PDF link annotation
    • http://afracheat1.xyz/3537961102yte06.pdfIn PDF document text
    • http://copyrightnotices-form.com/hockey_birthday_party_food_ideashq8dj.pdfIn PDF document text
    • https://cdn.sqhk.co/zezaxemepe/c8iggd1/ice_cream_drop_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/hRgjlsU/pupuwepusikuj.pdfIn PDF document text
    • http://bonus332.site/jipuraxonizazesopbmdal.pdfIn PDF document text
    • http://takinodexitimax.22web.org/maplestory_kinesis_skill_guide.pdfIn PDF document text
    • http://menedowu.iblogger.org/mopemaxav.pdfIn PDF document text
    • http://trickyturkey.com/wajexofisabasofi46dk.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/fedufiporara/allied_telesis_at-_8000s_cli_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/resize_bitmap_in_android.pdfIn PDF document text
    • http://sixexelotu.epizy.com/xowonesamisurodex.pdfIn PDF document text
    • http://vejesigivilowen.rf.gd/jiwerozenub.pdfIn PDF document text
    • http://vumavoralamo.rf.gd/rotipedetorori.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/78143564852.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/42034550943.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_off0000e373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE373 5084 bytes
SHA-256: 101d1ccb0d9358d31156216b7606c58798f681ff2252a2742d89e9d993e0cc5a
font_01_sfnt_off0000f4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A7 10300 bytes
SHA-256: 227709e33c959511b401142dab21249d386b1fab6c95368f2dfcd9f4b2620c1d