Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e4b1e6e850fa469…

MALICIOUS

PDF

70.3 KB Created: 2021-02-09 18:41:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 195a7d23467a559ea7e144d331a0de7b SHA-1: e2e4e0c1553495040ed04a583a1d828c17e6938b SHA-256: 8e4b1e6e850fa469c3098e2cffe549f95f7a1de6eeef6e93de22d194231e07f2
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 embedded URLs, with one prominent URL pointing to 'jottigo.ru' and disguised as a guide for reading a docket number. Heuristics indicate this PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/123?utm_term=how+to+read+bva+docket+number PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379846/normal_601bb75f1b872.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491155/normal_6002df8196a4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378425/normal_5fe425d73bf55.pdfIn PDF document text
    • https://zifosugelupoz.weebly.com/uploads/1/3/4/6/134693972/86d5bcb6ac80.pdfIn PDF document text
    • https://rekazisiw.weebly.com/uploads/1/3/0/8/130874265/mizumebixixoxubofev.pdfIn PDF document text
    • https://jonewaxuge.weebly.com/uploads/1/3/5/3/135319919/4888013.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409797/normal_5fcdf876b8180.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459926/normal_5fdbaa3c35ad2.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/loxopudizus/42750205563.pdfIn PDF document text
    • http://fukefuxatolu.epizy.com/alone_movie_mkv.pdfIn PDF document text
    • http://vibakiwijikilok.rf.gd/fgo_na_shimosa_guide.pdfIn PDF document text
    • http://napuvonir.epizy.com/captain_america_series.pdfIn PDF document text
    • http://wekumut.epizy.com/49764287560.pdfIn PDF document text
    • http://fasitefikiseli.rf.gd/addons_firefox_videos.pdfIn PDF document text
    • http://keguwaburafokul.epizy.com/dewudutumorosozemekuludip.pdfIn PDF document text
    • http://posivunoloreweb.rf.gd/vilativ.pdfIn PDF document text
    • http://jegajumofi.rf.gd/mebewubakezaleb.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/1593108808.pdfIn PDF document text
    • http://bikutuvuxaxixo.epizy.com/tuxajis.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/hackintosh_high_sierra_niresh_guide.pdfIn PDF document text
    • http://bajivuselome.epizy.com/86858889805.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_off0000d54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54B 5192 bytes
SHA-256: d74a7c298f04ac79838b894e33d91fc3baa1b2bc31737d2a376edebfcc751f9e
font_01_sfnt_off0000e6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F7 10864 bytes
SHA-256: ecb1cb898d7a8025ba6f7b3bc3dfe02aec070e23e777390c70fe68b9bec65c68

Open this report in the interactive analyzer, or submit your own file for analysis.