Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd3d3410e34fb02d…

MALICIOUS

PDF

81.6 KB Created: 2021-02-17 01:38:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 370789339beef84320db3ec35fd8061a SHA-1: b3f95da9520dbf2fc337ed37992b9fe65fcf154c SHA-256: cd3d3410e34fb02d323f095bcc33ea9fbb1ec7d22dbff67f23205bd221c4202f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with many pointing to disposable hosting and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/wix?keyword=dragon+age+inquisition+official+game+guide PDF link annotation
    • https://rowimunikak.weebly.com/uploads/1/3/5/3/135346477/momawumurifopuxi.pdfIn PDF document text
    • https://zujetopefij.weebly.com/uploads/1/3/4/7/134766602/7c2c0e.pdfIn PDF document text
    • https://waxevinibiwe.weebly.com/uploads/1/3/0/9/130969944/masijosumifetoparoka.pdfIn PDF document text
    • http://podarokinsta.online/13679515090pqh95.pdfIn PDF document text
    • http://melifalafijuz.22web.org/87522789339.pdfIn PDF document text
    • https://cdn.sqhk.co/tarekekog/cgcBh3Z/ritejogudokun.pdfIn PDF document text
    • https://fojumotapikapig.weebly.com/uploads/1/3/4/3/134372119/ritavimumeba-rotipivexed-tixotib.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/jde6Nhe/18698816412.pdfIn PDF document text
    • http://lufavometazajur.iblogger.org/vcloud_api_programming_guide_5._5.pdfIn PDF document text
    • http://gabutetidik.22web.org/guided_reading_books_ks1.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/ngDiige/nanuxurozusawebobizo.pdfIn PDF document text
    • http://feyakast.online/dijatepirakiwurapikapur2ydq.pdfIn PDF document text
    • http://shopwithsale.website/pugimubakobowedumunmob7u.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://rewifavad.epizy.com/audio_vision_pro_mod.pdfIn PDF document text
    • http://rizibapuzaduxe.epizy.com/define_annotation_in_bioinformatics.pdfIn PDF document text
    • http://votitagupen.epizy.com/ancel_keys_starvation_study.pdfIn PDF document text
    • http://zasidad.epizy.com/45730949740.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_off0000f68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68E 5348 bytes
SHA-256: 7dad639222fe947ebc8b9fc80dad069546f0d7dda6cc1adc947a7047470d37f2
font_01_sfnt_off00010895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10895 9952 bytes
SHA-256: ca56f7aedd207a407de1707a04549dc303a51b6a8bbd66db03c61b9d04b0dfb9
font_02_sfnt_off00012aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA6 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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