Malicious PDF — malware analysis report

Static analysis result for SHA-256 5103066d523297e9…

MALICIOUS

PDF

75.2 KB Created: 2021-02-22 13:47:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4dd6161d5eb40abd2267878e5f8d6f83 SHA-1: fa30161aacfd2f8784c49caa9a578250e335413e SHA-256: 5103066d523297e929e9f93cf4a4805a95799e7cce5d26e5d97a871becd45f0c
196 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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?utm_term=%2524100+startup+book+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388420/normal_5ff109f7dde13.pdfIn PDF document text
    • https://nolabuxovitu.weebly.com/uploads/1/3/5/3/135305824/manuxeworofixobixina.pdfIn PDF document text
    • http://glasshookahcatering.com/grimmett_and_welsh_probability_an_introductiono1n1b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393908/normal_600921d293f97.pdfIn PDF document text
    • http://madalez.22web.org/tidixopezuvukagixudene.pdfIn PDF document text
    • http://joxuxodojej.22web.org/84407781364.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369911/normal_5ff76c315688a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446286/normal_602097270df44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458137/normal_5fed4c39a7052.pdfIn PDF document text
    • http://savadaqwe.space/mandated_report_definitiono17gp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_6031e81b4a7f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5fd5fd49ca432.pdfIn PDF document text
    • https://nagugopusoz.weebly.com/uploads/1/3/4/6/134645600/4519686.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452372/normal_5fe0613883b32.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vikuladaputak.rf.gd/iworkcommunity_resume_templates.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_off0000e877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE877 5544 bytes
SHA-256: d7b6b553a79b2662203af7cade28de16f658dcebc27c650030456fe4b260b2b6
font_01_sfnt_off0000fb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB68 10820 bytes
SHA-256: 6b40011c0cae5c7360e3f2f5e3b629e435806e3f9070234fe66a8f5ef70d92b2