Malicious PDF — malware analysis report

Static analysis result for SHA-256 6018e8ef98acad86…

MALICIOUS

PDF

53.3 KB Created: 2020-12-22 23:01:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5a202914ca571a47e9a97871aa5c5e39 SHA-1: 53a497986d1185f3cae9adcc8f28665ad4dafb22 SHA-256: 6018e8ef98acad86f9121c2512bacd48d3403d335def7cea00eb283251b5ac1a
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of embedded links, many of which point to disposable hosting and are designed to redirect users. One of the primary links, https://cctraff.ru/strik?utm_term=samsung+level+u+pro+app+for+iphone, is identified as a malicious redirector. The file's structure and the nature of the links suggest it is part of a phishing or scam campaign, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9483

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.
  • 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.
  • 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/strik?utm_term=samsung+level+u+pro+app+for+iphone In PDF document text
    • https://gipafefigemer.weebly.com/uploads/1/3/4/0/134097902/2884523.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410194/normal_5fd7a5c2565dd.pdfIn PDF document text
    • https://likuxosudiva.weebly.com/uploads/1/3/4/6/134603152/pukofamazijob.pdfIn PDF document text
    • https://varivupe.weebly.com/uploads/1/3/4/4/134480773/fuwik_jubasixiri_fijadubagora.pdfIn PDF document text
    • https://gabesusot.weebly.com/uploads/1/3/4/8/134895193/vomalakur.pdfIn PDF document text
    • https://dililoperajat.weebly.com/uploads/1/3/4/6/134631443/zupolatinofuzaf.pdfIn PDF document text
    • https://mazemisa.weebly.com/uploads/1/3/4/6/134692176/4403692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393755/normal_5f93ad683abe7.pdfIn PDF document text
    • https://sokexuwog.weebly.com/uploads/1/3/4/3/134351495/jazolesamuz.pdfIn PDF document text
    • https://nidiladidubupa.weebly.com/uploads/1/3/4/7/134753920/89b95966f2f.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/5fc10304b8467722f1d4df02/t/5fc3951118e72e5fdb464192/1606653201530/twin_studies_suggest_that_alzheimers_disease_is_influenced_by_group_of_answer_choices.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6703448-6c50-474e-ae13-e8ebd40771bd/77148846192.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc002e7e5c7695ca996b6a8/t/5fc285e008845d0924dbda43/1606583778150/nfl_rush_zone_games_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cf0a1af-9f1d-4740-b11a-f4c5780df496/finig.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB92F 5480 bytes
SHA-256: 1bc79dc5830c241426c9b1a9b480b5e54b241cf57b6e6967b1bf12aab97e04ff