Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef7f2356274e6e0f…

MALICIOUS

PDF

71.5 KB Created: 2021-03-03 05:15:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5a9da3600e2745995791c87dd07ff466 SHA-1: 59108c85a5dfaddc8fffae5667adccb39f6063bf SHA-256: ef7f2356274e6e0f4f25eae6cebaa784e9250608f1af024f631d69373b7e9ad5
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=how+much+do+dentist+assistants+make+an+hour PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370987/normal_60149ebb1dace.pdfIn PDF document text
    • https://cdn.sqhk.co/buzaxelubot/IJgfVDD/jutunaninutavo.pdfIn PDF document text
    • http://acupofjacob.com/712453459069njey.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/fugchgK/metal_boyama_teknikleri_video.pdfIn PDF document text
    • http://probmake12.xyz/44946316271d0w5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463005/normal_6007bd12e0fd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383449/normal_60250ee66c574.pdfIn PDF document text
    • http://otomail.business/saudade_portuguese_meaning62ew9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371010/normal_60092565b4c1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465565/normal_602295d873a22.pdfIn PDF document text
    • https://cdn.sqhk.co/besimiwi/hjdCYXK/6190728626.pdfIn PDF document text
    • http://procripton.com/tudunipusaxas8v9gc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fejiremow.epizy.com/putoguzexelojarepu.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/gapor.pdfIn PDF document text
    • http://pikosugurib.rf.gd/febomuwitavosufukubu.pdfIn PDF document text
    • http://betejutejiw.rf.gd/5_dysfunctions_of_a_team_assessment_scoring.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_off0000d9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C4 5264 bytes
SHA-256: 67903472e0faa694d5f2581f697d618df441f175463ccb3b549001b9a9561801
font_01_sfnt_off0000eb8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8E 10956 bytes
SHA-256: 97606c88927886c8f0da2169c2195dd00f7dfd184eed3c78e78251cd8adc8754

Open this report in the interactive analyzer, or submit your own file for analysis.