Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d27dbf0fbe35c01…

MALICIOUS

PDF

80.1 KB Created: 2021-05-02 11:28:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9a8cfe4b139a619d97c549e9cb181bf0 SHA-1: 7e82855170e5869face44be515269fac72f54b17 SHA-256: 6d27dbf0fbe35c01425ef5f7f84c0691755a7d098e67a932972de9c312d4644d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a domain that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, contains text related to stock market crashes, suggesting a lure for financial scams or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=will+stock+market+crash+again+may+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456676/normal_5febcf3c6ee9b.pdfIn PDF document text
    • http://wejesigozolireb.getenjoyment.net/xogiverovowilodalawaluxik.pdfIn PDF document text
    • http://mumijivamivaxij.medianewsonline.com/argumentation_and_debate_download.pdfIn PDF document text
    • https://boraweterepin.weebly.com/uploads/1/3/4/8/134864111/407f8259857d7.pdfIn PDF document text
    • https://zanobuxukopul.weebly.com/uploads/1/3/4/6/134678616/283a8edcc29.pdfIn PDF document text
    • http://distornyup.site/bypass_icloud_activation_lock_iphone_4s45wwp.pdfIn PDF document text
    • http://bopolubolef.mywebcommunity.org/breath_of_the_wild_mini_guide_download.pdfIn PDF document text
    • http://yognat.space/ludurejofutebexifinanepqo1td.pdfIn PDF document text
    • https://giruwikepu.weebly.com/uploads/1/3/4/4/134464081/0325ab48706f0.pdfIn PDF document text
    • http://grigolia-studio.ru/3091099698600ys0.pdfIn PDF document text
    • https://bafuvaki.weebly.com/uploads/1/3/4/3/134336870/rowitipubon.pdfIn PDF document text
    • http://ecoterritory.store/lemaitre_closer_mp3qgp9l.pdfIn PDF document text
    • http://rumigiwataj.getenjoyment.net/xeduxasewigefaralu.pdfIn PDF document text
    • http://delaem-sami.online/english_vocabulary_in_use_advanced_book_with_answersqw541.pdfIn PDF document text
    • https://lividuxu.weebly.com/uploads/1/3/4/3/134354071/nubututoxuzezolupot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_605f58f5959cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://todiwefexoneb.atwebpages.com/wipusedarinalojinuwaw.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/89172446360.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/66701716316.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/30986774692.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_off0000f9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AC 5668 bytes
SHA-256: 4d7a7adcf61436fcf79492598b720f78b138a4f1e4aa7925abb9d9b712b78422
font_01_sfnt_off00010cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDF 11220 bytes
SHA-256: c7b30ca47f932c669f3900d2578f1974b02804072998d9a5c09fe5c02da365c2

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