Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3db11c4842013f3…

MALICIOUS

PDF

73.4 KB Created: 2021-01-28 01:45:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 747032e5bb5effc51682b6b416126eaa SHA-1: 4bbbdf2b94a8984ad391873b52f9b256dc71bc43 SHA-256: c3db11c4842013f323fbb6dfc71efb2b1454d1703987332b89d0a1222084f2aa
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://baarspo.ru/aws?utm_term=sales+and+marketing+management+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4394062/normal_5feee18191647.pdfIn PDF document text
    • https://tilolujow.weebly.com/uploads/1/3/1/1/131164317/kufurezupu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381529/normal_5fcced4d58ad6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488806/normal_5fdc40e8d0b85.pdfIn PDF document text
    • https://fudegedetet.weebly.com/uploads/1/3/4/7/134733785/rupuxedomanovi.pdfIn PDF document text
    • https://nabokopawupanav.weebly.com/uploads/1/3/0/7/130739772/witekezegepiwet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414682/normal_5ff7e7b6806a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392656/normal_5fccda5a73d80.pdfIn PDF document text
    • https://dilipifoson.weebly.com/uploads/1/3/1/0/131070096/vojabezetojoferitujo.pdfIn PDF document text
    • https://fezagexagowib.weebly.com/uploads/1/3/5/3/135313062/zoxawokobofoxuz.pdfIn PDF document text
    • http://gonzo-3d.com/79977702778kihdm.pdfIn PDF document text
    • https://gizomedapirev.weebly.com/uploads/1/3/1/4/131454265/1807532.pdfIn PDF document text
    • https://lawagupavuraxap.weebly.com/uploads/1/3/4/6/134616311/beriv-nipovevuw-moxaxefasimo-xufan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vejimugar.epizy.com/computational_algebraic_geometry.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/ecological_succession_quiz.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_off0000e1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CA 5528 bytes
SHA-256: 2565aef009706f0e01e56ce3b7eaea3c9113f2574d959631fd3ff86df51770b7
font_01_sfnt_off0000f47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47D 10720 bytes
SHA-256: a7ecbf7aba43165bda0d4a9f9e261abb1537c45fe5e6ee88fadfcf23fbe9f3ed