Malicious PDF — malware analysis report

Static analysis result for SHA-256 5228ddc238d6828e…

MALICIOUS

PDF

74.1 KB Created: 2021-03-02 17:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 35fcb91e109815e9fc1beece9904eff7 SHA-1: 3ea49aa4a3e9ac2cc65ec607efaf1ee1bd94e413 SHA-256: 5228ddc238d6828ea3a9486f72788796719381a488b9a0d465dde9bd2eea1516
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO poisoning attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs are designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=jenn+air+electric+convection+oven+manual PDF link annotation
    • http://watertea.space/77646393394m99fb.pdfIn PDF document text
    • http://drilltech.info/21400245308jczy8.pdfIn PDF document text
    • http://bezprovodov.guru/23245701214uwp5x.pdfIn PDF document text
    • http://dororuminaxa.mywebcommunity.org/law_and_social_justice_class_8_extra_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/jidobimatu/Sjc6ppF/71521840817.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/azCiijj/wrestling_revolution_2d_unlocked_apk_download.pdfIn PDF document text
    • https://xazebuwojij.weebly.com/uploads/1/3/4/4/134467588/1045cc4202a.pdfIn PDF document text
    • https://cdn.sqhk.co/sivefuxonix/ghhetkX/trucks_off_road_mod_apk_download.pdfIn PDF document text
    • https://fileduwefevara.weebly.com/uploads/1/3/4/3/134384607/5fc7de45c4cd.pdfIn PDF document text
    • https://pepesavujol.weebly.com/uploads/1/3/1/0/131071240/zibuner.pdfIn PDF document text
    • https://cdn.sqhk.co/dilobowuz/hhaHxjj/53832653313.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/what_is_a_breach_of_contract_law_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzirixowev/6DidhcW/athletic_apparel_stores.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/ihejiij/pidosurajatane.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383688/normal_60152975dfd01.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/ijuG4jj/hill_racing_pvp_mod_apk_revdl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388289/normal_6022d8cd12c49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407997/normal_5ff45e19d6f8e.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/jhic1Bi/vuzadapu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/how_to_connect_bose_companion_2_speakers_to_laptop.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_off0000e63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63C 4816 bytes
SHA-256: 555c8278d61bd7dc2745211877cf6f4901df496e5821e95f1dcb396c814cabb6
font_01_sfnt_off0000f690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF690 10868 bytes
SHA-256: 7d8dcc289d79a9a2893113c017ed7009faa3a17dd42d7abc526607853d3a390f

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