Malicious PDF — malware analysis report

Static analysis result for SHA-256 d003f3a256d425cd…

MALICIOUS

PDF

69.1 KB Created: 2020-12-17 16:00:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9f1ff259c9ef201a39abca51b524fe26 SHA-1: 9595cf37b0cb114e7e611826778d3273778189bb SHA-256: d003f3a256d425cd2aff3c19e1becd7cbafb6b4514007fa1aa9e7527184a82e4
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic firings indicate a link farm and a phishing/trojan detection by ClamAV. While no scripts were extracted, the presence of numerous external links suggests an attempt to direct the user to malicious content, likely for phishing or malware download.

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
  • 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.
  • 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://cctraff.ru/aws?utm_term=conduction+system+of+the+heart+worksheet+answers In PDF document text
    • https://mewifukemi.weebly.com/uploads/1/3/4/7/134764424/xepojewip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_5f8c06039902e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378827/normal_5fc8c1c062020.pdfIn PDF document text
    • https://guxadudupis.weebly.com/uploads/1/3/4/7/134751999/7787105.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413475/normal_5fbe2800a4eef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5b13f3de5e49b55bafd6/1606376219993/kicker_hideaway_hs10_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9889e570-26c1-4830-a8d4-54990600d392/sutideritazaw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57e0612facd59cecc162a/t/5fcd7ec8f94b6402b2313222/1607302862268/gipixug.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/gazojixemoxi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd00f229c5e266902661e9/1606222068395/caracteristicas_de_la_investigacion_cualitativa_ejemplos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37abf9a0-125d-45db-ada5-bcdfae2ee83d/jitaxamevebop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8b9a19e-8c9b-4f0e-b524-c7db0c577008/jixazafowonagumipafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1440f637-2805-43dd-b2c7-ff6b320ea789/dadute.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_off0000d268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD268 5392 bytes
SHA-256: 93c5dc5ce8e4c2bf9eda1898327ddae5baf9f4384638fb65b24fe6dd9a6efb01
font_01_sfnt_off0000e4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A9 10288 bytes
SHA-256: 3c7d32b4b8df4f3a3375ba8204096802fa49b1005bf29223753b97483c42a6fc

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