Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3150dca31078c4…

MALICIOUS

PDF

66.5 KB Created: 2021-02-07 21:48:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e7258b70c1bb55fb34c5929adb8110cf SHA-1: 25d5e2bf533b265a9391c1f955683bb29d2513a1 SHA-256: 9d3150dca31078c463273160c2aabca686a749a430377c70857fd4337ea8e828
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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/123?utm_term=lingua+latina+answer+key In PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/Lhij3Dd/84261741331.pdfIn PDF document text
    • https://cdn.sqhk.co/dowusutitozi/dOSgcgf/70832668866.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/sjg0iiY/99669380217.pdfIn PDF document text
    • https://cdn.sqhk.co/wefonasifaza/fr3oi4Y/87002738375.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/ijheijO/71397625677.pdfIn PDF document text
    • http://hargotel.xyz/loxexavefugenobokekutpmim5.pdfIn PDF document text
    • http://djami.ru/clubbers_guide_2010_tracklistl08h6.pdfIn PDF document text
    • https://cdn.sqhk.co/tokotuxajif/jiai2ji/9030249979.pdfIn PDF document text
    • https://cdn.sqhk.co/lipebefaje/gggjH9E/logiwijadepezixozatisa.pdfIn PDF document text
    • https://cdn.sqhk.co/desiruzag/iftrREX/78677004187.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/eXjhlcK/bass_pro_shop_near_bolingbrook_il.pdfIn PDF document text
    • http://serdyukov.pro/psychological_facts_freehilmh.pdfIn PDF document text
    • https://romenazojojeles.weebly.com/uploads/1/3/0/7/130775884/5850035.pdfIn PDF document text
    • https://texelerozalom.weebly.com/uploads/1/3/5/3/135314582/afe4f06c93.pdfIn PDF document text
    • http://shoop-ff.ru/5439462823nvtfb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gitogopafo.epizy.com/15350896118.pdfIn PDF document text
    • http://disorasejazamu.epizy.com/dakunawix.pdfIn PDF document text
    • http://mopufeva.epizy.com/nupetijaxelodetiguxuk.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_off0000c618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC618 5052 bytes
SHA-256: 110f920ef363134367c14051a83e68686000d848b8563543674a3212bb8de71d
font_01_sfnt_off0000d777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD777 11012 bytes
SHA-256: 9a13008f4feb3869ad9dfabebadea9f09648e909225e253952031923632f7dc2

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