Malicious PDF — malware analysis report

Static analysis result for SHA-256 615c300c6fa39916…

MALICIOUS

PDF

67.2 KB Created: 2021-02-24 02:50:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ee74a89dbe697da122d9f5fbcbf04fc4 SHA-1: c01c1a5514493104580057e4d4280a15bb58f836 SHA-256: 615c300c6fa399167bc26ed318d4a52137cdffbe89d825ff806e9b649137e6b8
156 Risk Score

Malware Insights

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

The PDF contains an embedded URL that mimics a search result, likely to trick users into visiting a malicious site. The heuristic firings indicate a link farm and a phishing/trojan detection by ClamAV, further supporting the malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jottigo.ru/123?utm_term=how+do+you+reset+the+tire+pressure+sensor+on+a+2007+jeep+grand+cherokee PDF link annotation
    • https://cdn.sqhk.co/giripiponi/gchbyhf/screen_time_control_app_review.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/Pgeidhb/vitamin_shoppe_probiotic_complex.pdfIn PDF document text
    • https://cdn.sqhk.co/neratimo/jDsOv4h/seroruwuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/che5ujg/twitter_video_downloader_iphone_shortcut.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/VjcwXkv/27505849099.pdfIn PDF document text
    • https://cdn.sqhk.co/muzedikerum/mqDQheR/sijodu.pdfIn PDF document text
    • https://sasozubavurak.weebly.com/uploads/1/3/4/8/134886198/xuxagubuvizu.pdfIn PDF document text
    • https://dofuzubakav.weebly.com/uploads/1/3/1/6/131606612/jilogumane.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/iViejgX/xuboto.pdfIn PDF document text
    • https://wimaxexuxiwob.weebly.com/uploads/1/3/0/8/130874544/zuvamupuki.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/tamobalasu/annual_report_pt_telkom_2018.pdfIn PDF document text
    • http://fezajeb.epizy.com/gujawuxegetesajusilik.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/42288392818.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/15815011200.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/bakra_eid_ki_images.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC840 5952 bytes
SHA-256: a629f4ba8610606e4ec1b142db4ed1129c84033907b467d9b0d6d5f5738bf82a
font_01_sfnt_off0000dca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA2 10160 bytes
SHA-256: 77f49d4159efe95ac28ddc242f93c15d12d5493572e3e09793c8e7d04e5571d9

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