Malicious PDF — malware analysis report

Static analysis result for SHA-256 61cc1c1c71b5292b…

MALICIOUS

PDF

70.5 KB Created: 2021-03-03 20:01:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: a9fc13a138ba4e7a331da7e5a046cd70 SHA-1: a6f744da5798dadb055209f3482576af7e6d4286 SHA-256: 61cc1c1c71b5292bab13ed34474a5b60fc0e04b4ae4fbd9ef75775cb9e58ff18
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dugedepap.ru/award?keyword=football+manager+2016+best+tactics+for+lower+leagues PDF link annotation
    • http://cesaregaspari.com/68033088926x4nyu.pdfIn PDF document text
    • http://testertumentum.space/kakujomh0bpi.pdfIn PDF document text
    • https://cdn.sqhk.co/mavixuwaloz/eigPjjY/flip_skater_mod_apk_ios.pdfIn PDF document text
    • https://fifusikusivupe.weebly.com/uploads/1/3/4/6/134638905/f7d90de9a41c6.pdfIn PDF document text
    • https://jolexufawiro.weebly.com/uploads/1/3/4/5/134595506/wesipur.pdfIn PDF document text
    • https://cdn.sqhk.co/pawexedibib/qsifyNO/ruporemanufakobo.pdfIn PDF document text
    • http://rewita.fun/740502136953234d.pdfIn PDF document text
    • http://testrun.ru/sewibusubujowenune03iir.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/hggdjaE/dimecuba_noticias_hoy.pdfIn PDF document text
    • https://cdn.sqhk.co/zitedefew/ogeNidw/91465763825.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://girofili.myartsonline.com/gegomibizukunonovazufaz.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_off0000d7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DB 5868 bytes
SHA-256: cf89510a5fbc14032656f3906929facaddb536343cbd24fde1aa719429897307
font_01_sfnt_off0000ebdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDD 9796 bytes
SHA-256: b52d634feaf78fedc63a815e9ce2bb7429b27c03003d43f3516ab766060bc8b0