Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e489865ab7796f8…

MALICIOUS

PDF

74.2 KB Created: 2021-03-31 03:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a3f82a21894462b2e8499785d75ab7d0 SHA-1: 8d0d0dfc644e002763c5578f2a7848286e9a4cba SHA-256: 6e489865ab7796f88ebcedd7d7524f10d1942ad789ef0fa65c40b028ad504146
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jottigo.ru/award?keyword=reading+answer+sheet+pdf+ielts PDF link annotation
    • https://pokumajapemen.weebly.com/uploads/1/3/4/4/134490217/050816.pdfIn PDF document text
    • http://idealicacolumbia.site/katt_williams_great_america_torrentbgngj.pdfIn PDF document text
    • https://merugerizun.weebly.com/uploads/1/3/4/3/134337850/7577079.pdfIn PDF document text
    • http://prizinsta24.online/37433286935ev54e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453144/normal_600976969d14a.pdfIn PDF document text
    • http://zasaluto.iblogger.org/lakomenatemoterivetag.pdfIn PDF document text
    • http://ruroraratotu.66ghz.com/baked_sheet_pan_chicken_tenders.pdfIn PDF document text
    • http://disconto50.info/xuwogijome23ms8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392452/normal_602aaf088a2ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466161/normal_60450fc58ed5e.pdfIn PDF document text
    • http://godulonu.22web.org/fitajupugitimududowakifap.pdfIn PDF document text
    • http://mamunetosi.iblogger.org/65154131562.pdfIn PDF document text
    • http://mantenancie.com/calysta_bevier_songs9mxcm.pdfIn PDF document text
    • http://procripton.com/lokigezertp26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fugewad.rf.gd/alesis_nitro_kit_manual.pdfIn PDF document text
    • http://lojupodinitaxug.epizy.com/unfreeze_my_equifax_credit_report.pdfIn PDF document text
    • http://gataton.rf.gd/75439221272.pdfIn PDF document text
    • http://puxedevonizu.epizy.com/54896255422.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_off0000e1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1ED 5404 bytes
SHA-256: f4f481742372d99e27e12b9d0ef6d4cab2ab27130c1f072a97e2973752844410
font_01_sfnt_off0000f463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF463 11056 bytes
SHA-256: 2cc97a65bcc3677dff1d361140f2dead5c6400428437cee498fe467e409f9e7f

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