Malicious PDF — malware analysis report

Static analysis result for SHA-256 11456b6ca76ecdb3…

MALICIOUS

PDF

75.7 KB Created: 2021-05-18 13:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f7769c347858b660fdbbd2d93bb4cdc2 SHA-1: e55e5e9857c38e282f04dc05b7de4d404202f758 SHA-256: 11456b6ca76ecdb38784b9880f349b759793f8e68867df2b8f28b1ba22a45b00
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to disposable hosting, characteristic of a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, suggests a lure related to product assembly or system setup, which is a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://botokaw.ru/strik?utm_term=spalding+48+nba+baller+basketball+system+assembly PDF link annotation
    • http://sofisejulewog.22web.org/how_to_reset_the_filter_on_a_honeywell_thermostat.pdfIn PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/9262517.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459318/normal_5fc8aa228d72f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428334/normal_604ebb3f74c27.pdfIn PDF document text
    • http://zavibepavate.22web.org/ripenaminina.pdfIn PDF document text
    • http://jezojarugeboz.22web.org/autodesk_sketchbook_pro_for_pc_free.pdfIn PDF document text
    • http://bakelenodizaro.iblogger.org/71392375590.pdfIn PDF document text
    • https://jizexukufi.weebly.com/uploads/1/3/4/1/134109318/defivafosen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403141/normal_5fe260f3d17c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_60283c697b57d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485156/normal_60306046537bf.pdfIn PDF document text
    • https://jivekale.weebly.com/uploads/1/3/4/3/134319103/2207310.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xazibubemefejo.epizy.com/bukawuxuranowujekefuxukel.pdfIn PDF document text
    • http://lejibunigazaxa.epizy.com/36509163080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/222bcec9-f559-48cd-8091-21b8a6399996/tekin_rs_pro.pdfIn PDF document text
    • http://mafelag.rf.gd/acis_and_galatea.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c9ff055-5b3e-44b7-9e8b-a6bfc248fc07/client_service_job_description_sample.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_off0000e510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE510 5968 bytes
SHA-256: ff0460aa58f70d4a3e93bb7ce721249a31e6bf5011ca2df9b7b6bc1f2339f217
font_01_sfnt_off0000f954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF954 11792 bytes
SHA-256: 0b939188523e8f0a87e698605e262532a2ad7b34aae041a896c390ad2a354f46

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