Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d485016b99448a…

MALICIOUS

PDF

70.1 KB Created: 2021-02-13 13:43:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2cbdc423acb3bccc2bdeacc249aa9025 SHA-1: 59dfd515a6e240271f6cf4aaaf8d3853eebff71e SHA-256: 09d485016b99448a458a1a52a5eeecae2ab2c35f5db4ecf82e04f4a6fb308c4c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/wix?keyword=alto+shaam+combi+oven+service+manual PDF link annotation
    • http://cosmosqrab.online/35737272682d00i5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393911/normal_5fd69a7bdc1c9.pdfIn PDF document text
    • https://zegepefuloruwan.weebly.com/uploads/1/3/4/0/134012378/kusunujelek_sejel.pdfIn PDF document text
    • https://zonujonuwug.weebly.com/uploads/1/3/4/3/134309714/1810312e3d5f8a.pdfIn PDF document text
    • https://jizanisa.weebly.com/uploads/1/3/5/3/135386656/tedasiwuseb-rirer-votufof-luferavo.pdfIn PDF document text
    • http://opssmall.space/royal_guard_fish_and_chips_norwalk_connecticuthluz6.pdfIn PDF document text
    • https://xinozujo.weebly.com/uploads/1/3/0/8/130874257/dozasotafizujidino.pdfIn PDF document text
    • http://good-production9.site/foraminifera_adalah9dgwp.pdfIn PDF document text
    • http://firstflirts.site/64567428570huzho.pdfIn PDF document text
    • http://xiravudes.22web.org/nagagizux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417226/normal_5ffb3a5db6355.pdfIn PDF document text
    • https://disesusobabetom.weebly.com/uploads/1/3/0/8/130814900/3118464.pdfIn PDF document text
    • http://googsnat.space/celebration_of_life_template_publisher20hb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407084/normal_6015f3fe9eea9.pdfIn PDF document text
    • https://faxarumi.weebly.com/uploads/1/3/1/6/131606834/06043.pdfIn PDF document text
    • https://nodokesomizi.weebly.com/uploads/1/3/4/6/134656280/jonajabupebebexit.pdfIn PDF document text
    • http://puwonasomoso.22web.org/23186097680.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://roxonotagake.rf.gd/8896541027.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_off0000d77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77F 5228 bytes
SHA-256: ba45b72f32d9868439f21ab25090bf07d58c7fe22b5a8f67f6cd3e11a38792a3
font_01_sfnt_off0000e920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE920 9968 bytes
SHA-256: 7089a15d10d60a63fcebc6bd568429d7d7d8bd9df9e68f077f69a2e729cc6fa2

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