Malicious PDF — malware analysis report

Static analysis result for SHA-256 f456034c8252f1b9…

MALICIOUS

PDF

72.2 KB Created: 2021-02-13 10:39:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 08f4a4169ab206c0ec50bfeee996d136 SHA-1: effd44a0be307e39a9e32b7e4ab6432371d09940 SHA-256: f456034c8252f1b90e466cef1e18492b134e3e483ac8e2ac27758adadec5e24d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or spam campaign. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, appears to be a lure related to educational materials, further supporting the phishing pretext.

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://maypoin.ru/123?utm_term=daily+oral+language+10th+grade+pdf PDF link annotation
    • https://xogukozatakik.weebly.com/uploads/1/3/1/4/131453421/24c35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374978/normal_5fffb27cb846c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370284/normal_60115599c5782.pdfIn PDF document text
    • http://maewallace.com/gutenefolekibefapediritedc9g.pdfIn PDF document text
    • https://nijuvijoz.weebly.com/uploads/1/3/1/4/131408832/desij_xoxalu_medatuxita.pdfIn PDF document text
    • https://pomitowu.weebly.com/uploads/1/3/4/3/134389192/024707158e4.pdfIn PDF document text
    • http://trackengine.host/video_from_instagram_copy_link7jmyh.pdfIn PDF document text
    • https://luzatewuxajexi.weebly.com/uploads/1/3/4/2/134265782/ad913.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.site/mofigl8rm6.pdfIn PDF document text
    • http://secureappeal.com/21623965852mwker.pdfIn PDF document text
    • http://igcopyrightverify.com/systems_of_equations_worksheet_8th_gradefwth9.pdfIn PDF document text
    • https://xagigerabep.weebly.com/uploads/1/3/1/4/131483632/sefufofepatufow-sotuxumata.pdfIn PDF document text
    • http://sexedate69.site/29938383810fcf5i.pdfIn PDF document text
    • https://rarerosedipise.weebly.com/uploads/1/3/4/8/134876587/wunip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390996/normal_5fe60e9e1cc8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_5fd3b673ccab2.pdfIn PDF document text
    • http://nyvelsets.online/88631583259qbue1.pdfIn PDF document text
    • https://kawijidaxo.weebly.com/uploads/1/3/4/8/134891868/3926029.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD927 5420 bytes
SHA-256: 03d260841cdbbca1b08f1df3bc022d48749c82e51844856826fe0b1b2f0ce158
font_01_sfnt_off0000eba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA2 11824 bytes
SHA-256: 09633e99d87812d5ffd87602af87f9d24ec11edcbd847298a1918be6e529acc1

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