Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea702e557e399a8…

MALICIOUS

PDF

74.9 KB Created: 2020-11-20 08:48:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 51f73231c9fadb8be8c2b5bfe9fbf378 SHA-1: 9041b1f7426fc745bb798f51036c017d51343802 SHA-256: eea702e557e399a8016e92b280a953238a805c173e9137160e2b72408f8c296b
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristic firings indicating it is a malicious redirector, specifically designed for phishing or malware distribution. The embedded URL, https://traffine.ru/strik?utm_term=free+service+dog+certificate+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'free service dog certificate'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://traffine.ru/strik?utm_term=free+service+dog+certificate+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4481671/normal_5faf09e2139e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384310/normal_5fb2793f5c8c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462985/normal_5fa393af722f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426941/normal_5f9a2b72c37a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387060/normal_5f8e77349b65e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391001/normal_5f90e3fce958d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427105/normal_5f9db21d8d209.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413368/normal_5fa7ef20c25ec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/862254879.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/play_duck_life_4_hacked_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/camera_gadget_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8c3b7dc-4819-421c-9ecf-f73cfbaa3a35/electrnica_de_potencia_circuitos_di.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/placas_de_reconocimiento_para_pastores.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_off0000e7ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EC 5304 bytes
SHA-256: 7db1b2bebe7e26808396f407eae97afacb85b929c10a332c401bd240c11e8b4b
font_01_sfnt_off0000fa19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA19 10744 bytes
SHA-256: f6b3104b3e3e58e85715018f4cdb8a18b76dbd5bfa67bf577f96f37a061b7fd3