Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d1fa83670da62b…

MALICIOUS

PDF

78.6 KB Created: 2021-05-24 19:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 06aeb20bc48f5f13a01f2aa421c7309d SHA-1: 56644aca8af638472b5a2fa37cf3924e9ba362c9 SHA-256: 38d1fa83670da62bf5a0378a21f2558f371fbaca588de26b1ba0311b28a01b44
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 0.9998

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 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://pelibifir.ru/strik?utm_term=free+download+mp4+movies+hollywood+hindi+dubbed PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4365542/normal_5fcbae6aa46be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467912/normal_5fdf6589cac46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_60334bf0cf664.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476750/normal_5fd7dd59951b3.pdfIn PDF document text
    • https://keduwiwisa.weebly.com/uploads/1/3/4/4/134486116/gafutusi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384650/normal_6030aa7d5bee8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_601de68c3f38b.pdfIn PDF document text
    • https://denupadifujufo.weebly.com/uploads/1/3/0/8/130813478/31a3c0b168d.pdfIn PDF document text
    • https://xowonijateroz.weebly.com/uploads/1/3/1/3/131380337/wevowow.pdfIn PDF document text
    • https://notomufibaka.weebly.com/uploads/1/3/2/7/132740278/b2e596ccc0900.pdfIn PDF document text
    • https://manumuxalobo.weebly.com/uploads/1/3/5/3/135387638/28988a6e9670.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/dogevazapiwediw/27424438483.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/caa_drone_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/25805135537.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/android_espresso_wait_for_view_to_appear.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/combustion_analysis_pogil_ap_chemistry_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/vozukapavawifixi.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/www.usps.gov_address_change.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_off0000f3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3ED 5636 bytes
SHA-256: 8eb5460a5080682f0c369f696a83e7570f0b6c45a39008dd3db88ffaedd454c2
font_01_sfnt_off0001070d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070D 11136 bytes
SHA-256: c3398736f0d21bf0def26ad47d7fe8e401ffb35c6d2d1b198ed0f52754892847

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