Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8dae6f9695db7b1…

MALICIOUS

PDF

73.8 KB Created: 2021-02-22 10:40:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2a16c7f253b9e1b074ec5d3019b9205d SHA-1: 6776a47c5bd0e31e439fd8d304b1aa3f39e4922f SHA-256: a8dae6f9695db7b111f732931c2f3220d0c2662435f882a697b7fe81369f7c7a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to unit conversion and application metadata, suggesting a lure to trick users into clicking malicious links. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing.

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://bologen.ru/123?utm_term=cuanto+es+1+70+metros+en+pies PDF link annotation
    • https://zuveravovizopow.weebly.com/uploads/1/3/0/9/130969477/mojulipa.pdfIn PDF document text
    • https://cdn.sqhk.co/bitubebo/ighbjiM/xenonojevamulaxenenomegi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464056/normal_5fcfaaebdb661.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476577/normal_600d07f752bc6.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/jhchjhe/kofarowiwuwamiwani.pdfIn PDF document text
    • https://cdn.sqhk.co/rekutadis/gd8jjhh/19729506316.pdfIn PDF document text
    • http://lujakivuvig.22web.org/pengertian_pluralisme.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384142/normal_5ff174a4838ce.pdfIn PDF document text
    • https://seguvixezamab.weebly.com/uploads/1/3/5/9/135961197/9186693.pdfIn PDF document text
    • https://jimekijan.weebly.com/uploads/1/3/2/8/132815057/wenimibikeva_gafive_vigoxunepivitat.pdfIn PDF document text
    • https://cdn.sqhk.co/sepunaro/Qshggdv/raspberry_jam_bars_with_coconut.pdfIn PDF document text
    • https://xixilizuxuwogag.weebly.com/uploads/1/3/4/8/134879277/3482726.pdfIn PDF document text
    • http://regvoolkim.website/679183566225m8sc.pdfIn PDF document text
    • http://bufo.online/kubojefoxosibitafulmzgiq.pdfIn PDF document text
    • http://tur8osale.site/onkyo_tx-nr626_watts_per_channele8xoo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fizaveloxuraje.rf.gd/99250546124.pdfIn PDF document text
    • http://detuzepa.rf.gd/84219739367.pdfIn PDF document text
    • http://xojazexodiwosi.epizy.com/51512622642.pdfIn PDF document text
    • http://zanutebuxeboluv.rf.gd/natutapal.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_off0000e2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F3 5112 bytes
SHA-256: 8b307d042b6aa6e1ca73b255b2bf27c0d570b4f773bb9596ff6685efe414ed14
font_01_sfnt_off0000f442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF442 11232 bytes
SHA-256: dc2095dd1440e248c5f3c33201487d2b9e1de474ad866bb46068eef4ad2b539d

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