Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea39ee494f73a88…

MALICIOUS

PDF

75.0 KB Created: 2021-01-12 01:15:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8659b48ea1fe8a2f9319b4f9fa4cd134 SHA-1: 22f8017e271586a7c095ddbf5d1ac7167bfe7a57 SHA-256: 8ea39ee494f73a88c087fdf1d3250c0becfff19da23d504974fa1af54b57c67e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many of which are likely part of a link farm designed to manipulate search engine results. The heuristic PDF_SEO_LINK_FARM indicates a high volume of generated links, and the presence of an external URI pointing to 'trafficel.ru' suggests a malicious intent to redirect users to potentially harmful content. The ML classifier and ClamAV detection further support the malicious nature of this file.

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://trafficel.ru/aws?utm_term=horror+violin+sound+effect+free PDF link annotation
    • https://verikadofaja.weebly.com/uploads/1/3/2/3/132303102/9107566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483337/normal_5fc2ae45e7991.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/5247394.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415322/normal_5ff5eb087746a.pdfIn PDF document text
    • https://bufazojilenove.weebly.com/uploads/1/3/4/6/134639622/samogoxaxomu-kufakixij.pdfIn PDF document text
    • https://site-1084368.mozfiles.com/files/1084368/pottery_barn_classic_velvet_stockings.pdfIn PDF document text
    • https://cdn.sqhk.co/xagegegozi/a1ujdLa/marvel_unlimited_app_review.pdfIn PDF document text
    • https://site-1167927.mozfiles.com/files/1167927/70919509552.pdfIn PDF document text
    • https://xojumupaxasa.weebly.com/uploads/1/3/4/6/134605953/gabuse-mojofajen-nanutugorima-fuwubamoreb.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/1a27643b41869.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sugosubexez/m._c._h_in_blood_report.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/vegebubedomusesozedinojop.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/risk_issue_log_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/utopia_origin_map_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/poly_bridge_unblocked.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDE 4708 bytes
SHA-256: 3c768f6f00c35684fce45d7cec1ba74be426bdee62a0645842be5bc75b6a30aa
font_01_sfnt_off0000ede8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE8 10160 bytes
SHA-256: 3f4545cd43e2d4b99eb405608680263bedc2f97b8ca436b9b536c48735bf6b2f
font_02_sfnt_off000110a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A3 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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