Malicious PDF — malware analysis report

Static analysis result for SHA-256 0270d88d257f762a…

MALICIOUS

PDF

71.1 KB Created: 2021-04-07 11:13:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8bc614c8b7ea194c2c6123c60b72abdd SHA-1: d01cf010524bc8ade62bf97397179000329ee351 SHA-256: 0270d88d257f762a38da3de950327a8ef9b6c503819b3d5b3549b3abcadf261d
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm used for phishing or malware distribution. The embedded URLs, such as 'https://soxebez.ru/strik?utm_term=hatchet+gary+paulsen+full+movie', are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://soxebez.ru/strik?utm_term=hatchet+gary+paulsen+full+movie PDF link annotation
    • http://manibupefif.mypressonline.com/beyond_band_of_brothers_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384634/normal_5fe4e93a3a00d.pdfIn PDF document text
    • http://veradidefupuze.22web.org/1794-aent_setting_ip_address.pdfIn PDF document text
    • http://milafikolume.iblogger.org/tom_clancys_rainbow_six_siege_gold_edition_vs_normal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413125/normal_60272d1a22d42.pdfIn PDF document text
    • http://nugawijuxuv.mywebcommunity.org/bsnl_landline_cancellation_letter_format.pdfIn PDF document text
    • http://pebonemariv.mypressonline.com/wagoresexipokopigaki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497358/normal_60302058f2acd.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/fa2ace5e-b52b-4ccb-ab0f-0189df638671/statistics_for_business_decision_making_and_analysis_free.pdfIn PDF document text
    • http://gumonak.epizy.com/buzosamaguxaxepuwopuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30d1c6d1-087d-49ce-ad5d-e81add78b3f0/sunbeam_warming_blanket_washing_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a365a14f-5aa1-4214-87de-910b8dd3cd84/fasekizivimi.pdfIn PDF document text
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_49bcd23f265a4e638faf5c0d6cf8314a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4661c885-efb5-4741-a3aa-9a0cc49504b6/what_is_the_standard_carry_on_size_for_delta.pdfIn PDF document text
    • https://24976a62-ea59-4ca6-8500-d0bd08f9a094.filesusr.com/ugd/65a075_04484d43922048f69cc19e3c37766371.pdf?index=trueIn PDF document text
    • https://359ea524-acbf-40a7-8d58-ee96a8f10bc8.filesusr.com/ugd/ca2e76_4f8065e0a8784a74849168e7773c5144.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/841194af-d31b-467c-a9c4-cbbe3ae44d1a/how_to_mix_igora_hair_colour.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_off0000d8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F6 5552 bytes
SHA-256: 9f42601462d5f33e06427774d4e0b5bd0d3d3ea77c137b6c893d09d292a04cf8
font_01_sfnt_off0000ebc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC1 10404 bytes
SHA-256: acfe3feddcbd9f399543d18f841c43765bf4a455be7441b947d5434b3e880e4f

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