Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ae7ce8b850bb75…

MALICIOUS

PDF

94.8 KB Created: 2021-05-23 04:33:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 699a55a54b9e4757bdcc7325e7206021 SHA-1: d5de5561028d3de788924cf8a4299ea16ac66202 SHA-256: 64ae7ce8b850bb75d7e281db5345b589d5d1874fe23560aad2468a99539fb6df
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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 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.
  • 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://vilenefex.ru/strik?utm_term=ielts+writing+task+2+samples+band+6.5 PDF link annotation
    • https://jiromozuno.weebly.com/uploads/1/3/5/3/135387519/kasafalilig.pdfIn PDF document text
    • https://lawuzifelive.weebly.com/uploads/1/3/4/0/134041442/5430534.pdfIn PDF document text
    • https://jidobatixinel.weebly.com/uploads/1/3/4/7/134726111/variliwe.pdfIn PDF document text
    • https://webuseki.weebly.com/uploads/1/3/2/8/132814302/kamevoxekige_tojaves_rugabilukov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385228/normal_5fd356b403bed.pdfIn PDF document text
    • https://newomuzupigew.weebly.com/uploads/1/3/4/4/134468212/zajifew_lifofugiki_wokapibizowa_pukunal.pdfIn PDF document text
    • https://jomigotub.weebly.com/uploads/1/3/4/7/134748998/3122153.pdfIn PDF document text
    • https://vadenupajupav.weebly.com/uploads/1/3/4/3/134345777/a7bbe72b7238.pdfIn PDF document text
    • https://jaloteke.weebly.com/uploads/1/3/4/0/134096083/morajupegataxonuxis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498678/normal_605052f567d00.pdfIn PDF document text
    • https://fujowutel.weebly.com/uploads/1/3/3/9/133997949/3037494.pdfIn PDF document text
    • https://penatiwateli.weebly.com/uploads/1/3/4/6/134617533/f0c24a78d84ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/55863338681.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/nedomopevebak.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/kisigabaladezukud.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/carry_on_jatta_2012_movie_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/funny_damon_salvatore_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/the_wheel_of_time_tv_series_to_start_production_in_fall_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/18488713425.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/how_to_type_in_in_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/15262499160.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

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_off0001357b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1357B 5952 bytes
SHA-256: 94d52f6593af37779c228cef0f66a6123a0b1e7830695adb2913a02d12e49668
font_01_sfnt_off000149be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149BE 10532 bytes
SHA-256: 64baa8bd2da6b6c099f689deafdb724507a7768f1c5df45bfb5c6c0a81650c48

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