Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aaf30a30e1d7abf…

MALICIOUS

PDF

77.8 KB Created: 2021-03-23 19:24:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7a10d79a562e1c96f7efb490da9de369 SHA-1: 516427d911b3c0a5d18c2e9b6f69bf982a981eaa SHA-256: 9aaf30a30e1d7abf9eecaa835dae932608e43476aba59ce8da424d54e8560698
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, likely for further exploitation.

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://vilenefex.ru/wix?keyword=ina+may%2527s+guide+to+breastfeeding PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382423/normal_602dd3ce600de.pdfIn PDF document text
    • https://xebejadeveroj.weebly.com/uploads/1/3/0/9/130969735/fovupawav.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/xonawikobaxidunib6dj8r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392647/normal_6056eb131380c.pdfIn PDF document text
    • https://dunokosira.weebly.com/uploads/1/3/5/3/135349308/63576412a20a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477369/normal_5ff690e95533b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419192/normal_603f0e020ff65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409118/normal_5fe17af29bb41.pdfIn PDF document text
    • https://kilexudu.weebly.com/uploads/1/3/5/3/135347894/lefekivozifaf.pdfIn PDF document text
    • https://verulofu.weebly.com/uploads/1/3/4/0/134012380/2704445.pdfIn PDF document text
    • http://gixodugesu.medianewsonline.com/hp_laserjet_p2015dn_status_lights.pdfIn PDF document text
    • http://aicberg.net/2891334561tdbs7.pdfIn PDF document text
    • http://itanah.space/gomiwegajidajebabotoxe6v2e.pdfIn PDF document text
    • https://puxezemugip.weebly.com/uploads/1/3/4/3/134311794/0b990c03dcd7b.pdfIn PDF document text
    • http://lakegefufen.scienceontheweb.net/44711776686.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/crack_autodwg_to_dwg_converter_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/rijerav.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/oxford_american_dictionary_free_download.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_off0000f086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF086 5408 bytes
SHA-256: 563a93d0ea9c4c9ebe17ca863999ce69e45e5bcbee8d2eb0891b3f442d739781
font_01_sfnt_off000102e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E7 11048 bytes
SHA-256: f515b78756fd87000a5b146f10dd2c3a30aa85ad3aab7d486dbddeea07dc7fc7

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