Malicious PDF — malware analysis report

Static analysis result for SHA-256 60de5e739e163da9…

MALICIOUS

PDF

83.2 KB Created: 2021-04-07 18:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e6eb0958e52944366e315da3faab6ee7 SHA-1: 266a5cc329d6aa73cddb8f1f65673d4f2636e102 SHA-256: 60de5e739e163da90ef9df19fb0433bdc39be65092de63df67fa7c3fdde4ce49
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded links disguised as book resources, with a critical heuristic firing for a malicious redirector link to 'dafemum.ru'. This suggests the document is part of a link farm designed to redirect users to malicious sites, likely for phishing or malware delivery. The ML classifier strongly supports this malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/strik?utm_term=dog+man+and+cat+kid+book+read+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4474465/normal_6011ec6273266.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413585/normal_5fd96174b7f6b.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/2gc6xje/consonant_blends_worksheets_3rd_grade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446492/normal_5fdf070460dfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384821/normal_603fa8ea5000e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481163/normal_5fe0593d70b29.pdfIn PDF document text
    • https://cdn.sqhk.co/dasadogiso/f9K772z/download_cut_the_rope_time_travel_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483864/normal_5ffb387fadc64.pdfIn PDF document text
    • https://dodupezuvu.weebly.com/uploads/1/3/4/4/134443873/be66f2e14f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447662/normal_6013f4a91c1f9.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/gi6FJhd/thubten_chodron_buddhism_for_beginners.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445866/normal_5fc652d3e1e41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370090/normal_603357d04020f.pdfIn PDF document text
    • https://cdn.sqhk.co/bedogipaxog/jcdghgg/border_security_officer_wage.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/cM8Lhgj/68341975960.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492593/normal_602d4b7ef1cb2.pdfIn PDF document text
    • https://zivodigogugev.weebly.com/uploads/1/3/4/6/134664532/xeginimusina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403816/normal_5fd9e5b8b85f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_6054fcad61505.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/gusonefolaxuba-xakopegukosoleg-fobite-rudokabawez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371809/normal_5fca348fc8786.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428035/normal_60141bc171ee6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402519/normal_6019129fe8cfc.pdfIn PDF document text
    • https://wawotisusuwo.weebly.com/uploads/1/3/2/7/132741293/74d1eee6712b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/668605ff-6899-478c-8060-4bb3a4d79e5e/vapeju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6af2387-80ca-4c37-aebe-bd5d0433e6f2/hamlet_2009_full_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e25c67c2-57dd-4c16-997b-b219242a5e81/how_to_assess_patient_level_of_understanding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bba6314a-0b94-4f9d-a513-b32084b7fefb/axxess_aswc-1_steering_wheel_control_adapter_instructions.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_off00010796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10796 5284 bytes
SHA-256: d63a70acfbd9b8db83c81e0aa746f079da4f5a25c57b3dd4d8f69723d8c5fd14
font_01_sfnt_off00011982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11982 10908 bytes
SHA-256: d955bee90dd7cb0e574cc95d55d062f25f0b52df8d32d6d5027e9dc51f9322da

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