Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a18deaa913430b…

MALICIOUS

PDF

71.2 KB Created: 2021-03-03 19:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e149776d1d1e5c3f8766999b407dac34 SHA-1: eb76b566aab288d8a8f4bd9c28f321b41b45453f SHA-256: 34a18deaa913430b4a8de2cd13ac0cb0da329983f1a76b28d7fcdf1394ea2d17
126 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 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://golowaki.ru/strik?utm_term=five+nights+at+freddy%2527s+survival+logbook PDF link annotation
    • https://kakifimetuwojo.weebly.com/uploads/1/3/4/3/134317364/xorizexalologaxav.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/eriksons_stages_of_development_scholarly_articles.pdfIn PDF document text
    • https://fofupapezu.weebly.com/uploads/1/3/4/3/134356394/7108493.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417422/normal_5fda885119a75.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/nagiwuvosabukezus.pdfIn PDF document text
    • http://mukinumatonewo.getenjoyment.net/chemistry_density_problems_worksheet_answer_key.pdfIn PDF document text
    • https://motefeka.weebly.com/uploads/1/3/4/1/134108707/fisoguvowopoko-tijosudisepuva-makokedovi-wikasuwatit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389097/normal_5fe881c32504c.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/fekepenakobamedaxu.pdfIn PDF document text
    • https://bamegipizof.weebly.com/uploads/1/3/4/6/134647446/mogolabudipa.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/jiseba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mojokefav.epizy.com/gekemoxixinuxi.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/beyblade_burst_episodes_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/53901245573.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/hp_photosmart_c3180_scanner_driver_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_off0000d6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EA 5524 bytes
SHA-256: 3f05951429a38c460ea81c8170e6bb071116b708a4a3c39f1cc030a5e70f5ab0
font_01_sfnt_off0000e9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CC 11220 bytes
SHA-256: 678fe76076c6510ff8489e28b51bfc1dfa91685d5f64e40c3c0eb072fd353318

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