Malicious PDF — malware analysis report

Static analysis result for SHA-256 92db325733f459cb…

MALICIOUS

PDF

71.9 KB Created: 2021-03-16 07:18:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8b32e2e45b9a27cdf2df3a556b7c50ab SHA-1: b1e0e0d6aa8e64f4fff265f6f4c479dc797e2dbb SHA-256: 92db325733f459cbd0572897f9dfe2131702f30be6701082bb743a3f163125be
186 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 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://ponafet.ru/strik?utm_term=what+is+common+electrical+symbols PDF link annotation
    • http://a1metromovers.com/suledazujumenijisojarabsl9i3.pdfIn PDF document text
    • https://xibemorebag.weebly.com/uploads/1/3/4/3/134355918/80acc6480.pdfIn PDF document text
    • http://hotita.space/ruguteramexogilazotovopaxdi4ex.pdfIn PDF document text
    • https://lamosafobe.weebly.com/uploads/1/3/5/3/135322951/gikol-senilej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482413/normal_604eafad8640f.pdfIn PDF document text
    • https://meronikam.weebly.com/uploads/1/3/4/7/134705372/famowowatonowimafo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449973/normal_602d0c9ed5d07.pdfIn PDF document text
    • https://virixodebusetij.weebly.com/uploads/1/3/1/3/131383575/lujozop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448548/normal_5ff8a92510637.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401697/normal_5fe0e0d88e6e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444351/normal_5ff8ab69e4b5d.pdfIn PDF document text
    • https://bajorenurelop.weebly.com/uploads/1/3/0/7/130739037/2824342.pdfIn PDF document text
    • https://gimelasu.weebly.com/uploads/1/3/4/5/134513778/5c247fe.pdfIn PDF document text
    • https://sipinawuzukefo.weebly.com/uploads/1/3/1/4/131410227/5203339.pdfIn PDF document text
    • http://fitit.space/tokyo_ghoul_season_1_ending_song_lyricsrh2f6.pdfIn PDF document text
    • https://worofinuwur.weebly.com/uploads/1/3/4/5/134582463/futobi-vanigitapurowad-bolujuk-miruxuwedu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wozojatoxako.epizy.com/54505836921.pdfIn PDF document text
    • http://sulalanetoki.epizy.com/tamijivotejoxafabotupisu.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_off0000dd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD87 5292 bytes
SHA-256: 594dad81e01e312e33c1885062ea2a9b392ce1676d3e51664d685a9dcd6b4f54
font_01_sfnt_off0000ef6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6B 10128 bytes
SHA-256: 7b3359e26034da7165191d9591cf3c14c1266b536a007846906161d67f1c06aa

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