Malicious PDF — malware analysis report

Static analysis result for SHA-256 855a0bda82ee8f5d…

MALICIOUS

PDF

71.8 KB Created: 2021-02-24 21:44:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 7bbe8c22a0cdf6e67fbe8ce30f98d2a0 SHA-1: 2c21afa478d605490e71536b5786c10f71232888 SHA-256: 855a0bda82ee8f5d48e4ef252530b0b7ddd7074fa6e6bf78cdccb1151e1ab15d
184 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/award?keyword=how+to+update+2019+ram+uconnect In PDF document text
    • https://static.s123-cdn-static.com/uploads/4473403/normal_5fcb690280bdb.pdfIn PDF document text
    • http://idealslimitaly-official.site/shotgun_shot_sound_downloadr06d5.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/tateviwewexowop.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/hp_deskjet_2546r_wifi_setup.pdfIn PDF document text
    • http://medicalpracticementor.com/vekufomozojem6846.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/6903938.pdfIn PDF document text
    • https://jaketomerinojox.weebly.com/uploads/1/3/4/1/134109184/mirenizoxiri.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/12279141070.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375518/normal_5fdb9fcc37c04.pdfIn PDF document text
    • https://torolanomopefi.weebly.com/uploads/1/3/0/7/130739669/41a90a204.pdfIn PDF document text
    • https://tewabigonin.weebly.com/uploads/1/3/4/7/134760563/1656619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412894/normal_602185803f25e.pdfIn PDF document text
    • https://wufaxewixebel.weebly.com/uploads/1/3/5/3/135302410/bipuxipa_robakewofafat.pdfIn PDF document text
    • http://vopugixeroramox.medianewsonline.com/xasivagipagewimaganefuvav.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/bunker_hill_safe_95824_key.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416140/normal_5febb61327b13.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duxegejuw.atwebpages.com/43897812759.pdfIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/how_to_fit_an_integrated_headset.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_off0000db9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9F 5544 bytes
SHA-256: fca00736366d2fb2ea68171614aacd7741beda586bb0cebde14663332a9f3d22
font_01_sfnt_off0000ee7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7F 10504 bytes
SHA-256: a98f23022d5232a71afe210a3aad7a8bffa103641ddaf69b647e55795ec9fd11