Malicious PDF — malware analysis report

Static analysis result for SHA-256 d04df1dcdcbf6bf2…

MALICIOUS

PDF

79.1 KB Created: 2021-02-26 01:30:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8612c0ba27f84947c409d0e92d64bcc8 SHA-1: 6ecf8557d6c9b3d2c33b96fc43860bbd5c352257 SHA-256: d04df1dcdcbf6bf2e031f94ec5254cccc3f2ceffbd52f953ff14d0b1381ade65
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics indicate it contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs are likely used to redirect users to malicious content or phishing pages.

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/123?utm_term=is+this+still+lawn+boy PDF link annotation
    • https://foxewazijibaj.weebly.com/uploads/1/3/1/3/131379544/37b9b8cbf76a.pdfIn PDF document text
    • http://dududuw.mypressonline.com/nexupesekenupe.pdfIn PDF document text
    • https://cdn.sqhk.co/mowamukar/gcUhRih/uphill_rush_5_games.pdfIn PDF document text
    • https://cdn.sqhk.co/kobadaxo/hcIyidu/ghayal_once_again_full_movie_free_download_720p.pdfIn PDF document text
    • https://cdn.sqhk.co/zexatexa/Hhhgjif/escape_grandma_s_house_obby_online.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/fetibu.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/fiaibgd/sozeburukesife.pdfIn PDF document text
    • https://gugagefa.weebly.com/uploads/1/3/4/3/134343265/larugunodoba.pdfIn PDF document text
    • https://vabiwedewu.weebly.com/uploads/1/3/0/8/130813601/fuzupofavawej_fawalolukuwor_faxuvuseruwebu.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/9161052.pdfIn PDF document text
    • https://wuwabisa.weebly.com/uploads/1/3/1/6/131606234/07ce2597e40d.pdfIn PDF document text
    • https://gedesinikus.weebly.com/uploads/1/3/5/3/135323437/mimup-pegixisodoxo-vagetufokojenob-relunowubudep.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/2012933.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/ij3oDfI/yellowstone_national_park_interesting_facts.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/foxagafabinedofiv.pdfIn PDF document text
    • https://gorejirulikem.weebly.com/uploads/1/3/4/7/134738880/jisuxobi_dudavox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF876 4948 bytes
SHA-256: 04c0308d01e4103ae0ef5d215963158e1a8cfd77350aa0e6b48fc73b8ab512b8
font_01_sfnt_off00010962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10962 10832 bytes
SHA-256: 69e35309c155f371c4d9db8e95d456103d584fb28f745bf9fd4bbd9e3cb01548

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