Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb227f000519acfc…

MALICIOUS

PDF

79.3 KB Created: 2021-04-28 11:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f194416d8056517ee8ce26d386ab0a4a SHA-1: a13b4ef96fa345a97345ad8556c93950148fe809 SHA-256: bb227f000519acfce982fbfe89a067ba27f7477d251dcb7d501ccff4cde79872
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though partially corrupted, contains text related to movie synopses and Netflix, likely serving as a lure to encourage clicks on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://jacksth.ru/strik?utm_term=is+max+movie+on+netflix PDF link annotation
    • http://fidisop.22web.org/midnight_sun_twilight_synopsis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413231/normal_5feb8f953d3ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476270/normal_605d9d0a6e213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445864/normal_601bd6d5d4a37.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/hdjapea/32877002147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411001/normal_5fdb540ead9c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495531/normal_6052390959c6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420608/normal_5fe10337674e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451555/normal_5ff8f1a06ddcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427795/normal_5fde9f1c4415e.pdfIn PDF document text
    • https://cdn.sqhk.co/winogolelog/ejegjgr/dokawabinebujofax.pdfIn PDF document text
    • https://cdn.sqhk.co/puwupasakej/cHTdfgf/hotel_employee_panic_buttons.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://590703a0-be71-4d3c-a49f-17767d5969ef.filesusr.com/ugd/656c20_e3e0d6b1284f47ae87d821a746b631c8.pdf?index=trueIn PDF document text
    • https://81da36f4-dec6-4bf4-836b-19ed67500659.filesusr.com/ugd/5fd5c1_0d07c52fe28c4fa98e6126b8864bb3cb.pdf?index=trueIn PDF document text
    • http://jodonurinifos.epizy.com/chronic_boutonniere_deformity.pdfIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_436100b67c41443ab17f03bb56570a3d.pdf?index=trueIn PDF document text
    • http://viwuleraxukopiz.epizy.com/world_map_blank_worksheet.pdfIn PDF document text
    • http://vomifavub.epizy.com/71870282170.pdfIn PDF document text
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_2769a507a32840eb940f74fd46d89c80.pdf?index=trueIn PDF document text
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_72991e412fa440e683c1ec2309dcae3c.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFC 4668 bytes
SHA-256: 535fa8072179dae4bd15cd67f2ec452dccde17be5018352c74a5f1e8bf204771
font_01_sfnt_off0000fcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC1 10892 bytes
SHA-256: ac665cc9d16694927b9e0bee8a9ef660d1d1137eb997a015368f72fa69c9b63c
font_02_sfnt_off000121f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F3 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176