Malicious PDF — malware analysis report

Static analysis result for SHA-256 000beb74d42f1d0c…

MALICIOUS

PDF

81.1 KB Created: 2021-02-12 23:09:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9b5f58c2c677e4280db69436fe51a53c SHA-1: 22253984043be062b285a6dd447f22b90e853d9a SHA-256: 000beb74d42f1d0c6eda122c872d05d112d60fcecc4f7dbfc2f7e98881b08f6c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily garbled, contains references to 'Ipad air 32gb cellular' and application details, which could be part of a lure to entice clicks on the embedded malicious links.

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://druttle.ru/123?utm_term=ipad+air+32gb+cellular PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410030/normal_60107a0b3e5fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477638/normal_601469e3bc401.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484633/normal_5fe15d6e249ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_5fd3b63aa5751.pdfIn PDF document text
    • http://hargotel.xyz/60587386432dkqqp.pdfIn PDF document text
    • http://stickerrus.ru/48260265731hnz13.pdfIn PDF document text
    • http://fullhp.info/33828485789cdlek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499299/normal_5fd8098ce7fac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475720/normal_5fc96d3175f02.pdfIn PDF document text
    • http://nuferakake.iblogger.org/letibefi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453336/normal_5febe22b28866.pdfIn PDF document text
    • https://eplehuset.no/ipad-wi-fi-cellular-32-gb-stellargra-1?_In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://giwokekurodi.rf.gd/aiag_fmea_4th_edition_format.pdfIn PDF document text
    • http://sidakofonol.epizy.com/audioquest_niagara_1200_manual.pdfIn PDF document text
    • http://petilawunabebi.epizy.com/mcgraw_hill_leveled_books_guided_reading_level.pdfIn PDF document text
    • http://botalibinizor.rf.gd/kisupewizalotojikalasuga.pdfIn PDF document text
    • http://ritopagagibuxu.epizy.com/53606232278.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/free_ammyy_admin_3._4.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE846 5436 bytes
SHA-256: ae41898d85220996c97793d5e5296264f5f52588136d2e7aba99b623d3d034e6
font_01_sfnt_off0000facd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACD 11412 bytes
SHA-256: 135cd5b8190d1a981a47ba27c9683e1a672165de9139b2a17a30585d599a41d0
font_02_sfnt_off0001216c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216C 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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