Malicious PDF — malware analysis report

Static analysis result for SHA-256 0105cd6910f700d1…

MALICIOUS

PDF

68.1 KB Created: 2020-11-13 06:25:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0cf26552c6982a943072c18b214cb497 SHA-1: 58bf0096a2a4b3a125ee953a217b4099622e003d SHA-256: 0105cd6910f700d1b56fff7279e46aba70aa9f7e95cbe272c9e005de32f31bdf
214 Risk Score

Malware Insights

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

The PDF contains a large number of links to external websites, many of which are hosted on link farms like Weebly, suggesting a phishing or SEO spam campaign. The primary link directs to a malicious redirector, likely to further obfuscate the final destination. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/123?utm_term=the+odyssey+translated+by+stanley+lombardo+pdf
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/kezupukono.pdf
    • https://jikubefu.weebly.com/uploads/1/3/4/3/134318914/vuximap.pdf
    • https://mefevujeloz.weebly.com/uploads/1/3/4/3/134317202/jokek_zukagi_fofidevip_latejapuwefixux.pdf
    • https://tagekoworiz.weebly.com/uploads/1/3/4/0/134016686/2fa2f98.pdf
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/gunuraxed.pdf
    • https://nagigezivozitos.weebly.com/uploads/1/3/4/3/134340852/xufawasaruzesiriwa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/977d1ebe-7b74-4917-bedd-aa9e0dc8ae86/brocade_switch_type_108.pdf
    • https://uploads.strikinglycdn.com/files/88981b5f-296e-4c02-a782-63b2dd365b1f/goziwaduravugemi.pdf
    • https://s3.amazonaws.com/nabifovu/bejugikos.pdf
    • https://uploads.strikinglycdn.com/files/33837969-c254-4b65-8b14-f7bcb81e1028/radiohead_discography_download_blogspot.pdf
    • https://uploads.strikinglycdn.com/files/03e987a1-a14f-45ac-8220-d4c41da47a4a/a_course_in_econometrics_goldberger.pdf
    • https://uploads.strikinglycdn.com/files/3665255d-1f51-4a4c-af8d-8f5eb5f46a67/outlook_express_download_windows_7_64_bit.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cae5.bin
e40d8b79e8e85fc204d51c03393002b9303efa4cf671a4ccb72944500731cc5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE5 5472 bytes
font_01_sfnt_off0000dd57.bin
96e692e01041e221466d22461c6cf153252b79d23b278822dd60885a3856dee9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD57 11588 bytes

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