Malicious PDF — malware analysis report

Static analysis result for SHA-256 724d7455c3674317…

MALICIOUS

PDF

76.0 KB Created: 2021-03-29 20:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6eb91def90b9acbf3043595a69579e06 SHA-1: 73ab4fa00ac92579a9eea09269cbb112310ac53a SHA-256: 724d7455c367431740534eeeeefcb9aaeb984b663345833d311e0d1920e999bc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is designed to host a large number of external links, likely for SEO manipulation or to redirect users to malicious sites. The embedded URLs and the document's apparent purpose of providing 'Lipid disorder screening guidelines' point towards a phishing or scam attempt.

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
  • 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://nipisod.ru/123?utm_term=lipid+disorder+screening+guidelines PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481516/normal_60026a39ddd3c.pdfIn PDF document text
    • https://wovovude.weebly.com/uploads/1/3/1/3/131397940/9042841.pdfIn PDF document text
    • https://dejerolet.weebly.com/uploads/1/3/4/4/134444382/10b8026f7d83.pdfIn PDF document text
    • http://kleomaften.online/kv_narayanan_thermodynamicsrco0s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468563/normal_6051efd2905c6.pdfIn PDF document text
    • https://cdn.sqhk.co/gumorefose/eibQEhj/lawanepotadenazeled.pdfIn PDF document text
    • https://cdn.sqhk.co/lafixafif/dhfl21F/26815570772.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/8lijhbg/twisted_x_brewery_text_line.pdfIn PDF document text
    • https://taxedomarofagu.weebly.com/uploads/1/3/1/3/131378921/1365214.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/28341376829.pdfIn PDF document text
    • http://detonic-ufficiale.website/49727348057asvrs.pdfIn PDF document text
    • http://jopagozopive.medianewsonline.com/change_management_notes.pdfIn PDF document text
    • http://fullpisetc.ru/897502484670u9wc.pdfIn PDF document text
    • https://cdn.sqhk.co/xafukapewe/hcjf1hj/wudedatakalut.pdfIn PDF document text
    • http://nubolats.xyz/usps_mdd_scannery2abq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369524/normal_601d936cee322.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_73b01f7d412845cd9529584867a0b097.pdf?index=trueIn PDF document text
    • https://b724dda4-e2e0-47c5-811c-ae3b7273578b.filesusr.com/ugd/a1e5ee_501aabea53534edf8b3e0a91486b6705.pdf?index=trueIn PDF document text
    • http://woxikajir.myartsonline.com/41326144394.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_off0000ed68.bin
47d0248fa8817713f17de7001d58c53091cf8a3ae6fd32226819eaca8dbfcb0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED68 4972 bytes
font_01_sfnt_off0000fe68.bin
479c68fde2b34676d9d13be27d98a003de03fffc863550dc8aa279f3f03e5e62		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE68 10640 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.