Malicious PDF — malware analysis report

Static analysis result for SHA-256 a985d69fa5ccfa45…

MALICIOUS

PDF

76.1 KB Created: 2021-02-25 01:26:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3a3610ebdbbc3aebb9213cf21ad00e09 SHA-1: 2fbfa1ee574faa78b52f9557d37f729ac9b9030e SHA-256: a985d69fa5ccfa4570f27a9ebd3b123d3d28307b5c126115aeca1a02227fc766
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by multiple heuristics, including a critical alert for a malicious redirector link and ML classification. The embedded URL points to a suspicious domain, indicating an attempt to lure the user to a potentially harmful site. While no scripts were explicitly extracted, the PDF structure and the presence of malicious URLs strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=3.3+proving+lines+parallel+worksheet+answers In PDF document text
    • http://iclod.tech/what_foods_help_get_clear_skin2lehu.pdfIn PDF document text
    • http://ig-copyrighthelpcenter.com/21847412629cmmz8.pdfIn PDF document text
    • http://topcreditscore.info/namugasej8l7ip.pdfIn PDF document text
    • http://persequen.com/17547003384b00k8.pdfIn PDF document text
    • http://organicnu.info/hallelujah_handelkyue6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368245/normal_5ff4c137b5630.pdfIn PDF document text
    • http://fb-ig-copyright.com/rheem_tankless_water_heater_troubleshooting_no_hot_waterip8o9.pdfIn PDF document text
    • http://ceter.xyz/tuduloronepakaripukazedim2or9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417543/normal_601f6434a353e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462379/normal_6005b2d7e6f5a.pdfIn PDF document text
    • http://sunny-web.ru/what_is_google_cardboard_vrrw1li.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/buxoparadazegu/gufolesubafamimime.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/academedia_annual_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/66468152498.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/21865365530.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/blw_alimentao.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/24670251603.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/channel_46_atlanta_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/isotopic_abundance_practice_problems_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/39664655009.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/journal_article_template_google_docs.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/s_p_capital_iq_platform.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_off0000ebd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD4 5396 bytes
SHA-256: 34a0ac5270591faadacb5accb174fdbd4ace81d17c390b6faf98e4debcf554e0
font_01_sfnt_off0000fe46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE46 10956 bytes
SHA-256: 74e144a99e573c9f1e91b1157b7d39f18ac0117d332363fac204bc8b98aa0cbe

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