Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b8d76bddfddf69c…

MALICIOUS

PDF

72.5 KB Created: 2021-04-23 04:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0c08fc82f58648f5c525b95c015b5087 SHA-1: 207474c6ad60e3e4d2217a6f0a93f5df968055c5 SHA-256: 9b8d76bddfddf69c63385fbba7d73011823c2c067937f610b0ad269300d94e5c
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains a high number of embedded URLs, many pointing to disposable hosting, and one specific URL `https://jottigo.ru/strik?utm_term=lg+g2+mini+d618+caracteristicas` is highlighted as a potential lure. The document body is heavily obfuscated, but the presence of numerous links suggests an attempt to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=lg+g2+mini+d618+caracteristicas PDF link annotation
    • https://gosidobesek.weebly.com/uploads/1/3/4/0/134017516/9032828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375086/normal_603ff8f49025f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385612/normal_604a040fa34ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379233/normal_604a6a3fb2a7e.pdfIn PDF document text
    • https://nifiguxo.weebly.com/uploads/1/3/1/3/131398563/kojofijo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412154/normal_60397897b5dbd.pdfIn PDF document text
    • http://pomuropujuj.22web.org/dudeteraxomojexire.pdfIn PDF document text
    • https://bunekapizo.weebly.com/uploads/1/3/0/9/130969144/817201.pdfIn PDF document text
    • https://giliruba.weebly.com/uploads/1/3/1/4/131483170/dexunonu_jisesusigof.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
    • http://jamiwurono.epizy.com/hi_point_c9_trigger_pull.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25e98184-0b5f-4ce6-a279-d2c1c0f4a8d3/batoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/811024a2-ff63-4060-85ca-1b339b3a455d/64961070329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4efd70a-3b0a-4ded-b4f4-c8cbf6104af9/sat_math_exam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6742f61c-6c21-47ab-9002-72abef179443/the_basic_works_of_aristotle.pdfIn PDF document text
    • http://jigujirew.epizy.com/herman_bavinck_reformed_dogmatics.pdfIn PDF document text
    • http://kelawevosotifid.rf.gd/healing_for_damaged_emotions_book.pdfIn PDF document text
    • http://detotoga.epizy.com/rinaxot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e869bd-7423-49fb-b9db-f96b4ffbe551/migagusiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/080ab0d8-66f9-4152-8cc5-514aa81f4f40/pluralistic_theory_of_sovereignty_was_first_propounded_by.pdfIn PDF document text
    • http://tegowifumeni.rf.gd/gewege.pdfIn PDF document text
    • http://lizaduguxo.epizy.com/kambrook_aspire_espresso_maker_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD72 5380 bytes
SHA-256: 6743161485e3ab5ab7ff5ca2fe97967151812f1cc7833198269dbcf59b0d0ee9
font_01_sfnt_off0000df8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8D 11604 bytes
SHA-256: da0983137e4d096ca92b3c9f3755b42fb6d384a8d91ee366daf29cd1a858811d
font_02_sfnt_off0001053b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053B 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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