Malicious PDF — malware analysis report

Static analysis result for SHA-256 268c1a1039d36d4b…

MALICIOUS

PDF

69.5 KB Created: 2021-02-26 04:40:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0b77f781d416fb91f357d9b49f8dda33 SHA-1: bd240ba6ab367016670b10008209cf4104b64553 SHA-256: 268c1a1039d36d4be4413d228e03a96c996cde8b2b6c2e15fd6ba17af5be5f6c
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=duracell+cef+14+n+nimh+battery+charger+instructions In PDF document text
    • http://luwimifamofuper.iblogger.org/pukixolo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382772/normal_5fe02a8d64693.pdfIn PDF document text
    • http://rokamik.iblogger.org/25417063521.pdfIn PDF document text
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/5520648.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452193/normal_5ffa56a38f583.pdfIn PDF document text
    • https://dezitatukuti.weebly.com/uploads/1/3/5/3/135389988/4729434.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457862/normal_5ffcefc17861a.pdfIn PDF document text
    • https://vumiluvitut.weebly.com/uploads/1/3/2/6/132696113/zoselobetuto.pdfIn PDF document text
    • https://xojowikenokux.weebly.com/uploads/1/3/4/7/134706662/692123afc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475992/normal_5fda1e3529e4a.pdfIn PDF document text
    • http://punejew.mygamesonline.org/define_clarion_call_wiki.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/gozifep/nakajuredov.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/55860745158.pdfIn PDF document text
    • http://wevikokuzufos.epizy.com/android_yahoo_mail_app_push_settings.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/pdf_file_example_one_page.pdfIn PDF document text
    • http://rowovotufuru.epizy.com/51753671954.pdfIn PDF document text
    • http://sokevigaku.rf.gd/vojegoter.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_off0000d2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C0 5676 bytes
SHA-256: 6ab5d961954aa2e2b4a3947d3f0a0432b49eb42e51dd597a6944e7bf8fa43eb0
font_01_sfnt_off0000e5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FE 10112 bytes
SHA-256: 61f4d610a8eb8f5387162f3ce972ecb0e6f00b76ce8489dce00f193d1dc4a91d