Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2633af1812d57c6…

MALICIOUS

PDF

74.7 KB Created: 2021-03-06 13:30:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 13ac716b84058d52539d7ae7c88f2dee SHA-1: b1c97659198c3b8b8875ba228adae1d885e6b3db SHA-256: d2633af1812d57c6fbe33de6a76ceea41eb9dd9a198c3e4dce1277ce5c5fe849
126 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 embedded URLs pointing to various PDF documents hosted on disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ML classifier strongly indicate malicious intent. The primary URL, 'https://xajibur.ru/123?utm_term=premiere+pro+download+free+mac', attempts to trick users into downloading software by impersonating a legitimate download link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/123?utm_term=premiere+pro+download+free+mac PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414357/normal_6024cf5e36ca3.pdfIn PDF document text
    • http://retys.space/latin_root_worksheetbnamj.pdfIn PDF document text
    • http://6gusevshop.space/adding_filter_to_excel_spreadsheetefxwf.pdfIn PDF document text
    • https://gixebodaloru.weebly.com/uploads/1/3/1/3/131379223/776096.pdfIn PDF document text
    • http://adyga.site/men_ham_namoz_o27qiyman2eohz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412161/normal_603601f8a83f9.pdfIn PDF document text
    • http://profer-opt.ru/yuntum_marathi_movie_songs1pjgz.pdfIn PDF document text
    • http://lassituda.online/hp_elitebook_8570p_batterycylw0.pdfIn PDF document text
    • https://likifovufuli.weebly.com/uploads/1/3/4/5/134588617/3946170.pdfIn PDF document text
    • http://discount50it.pro/stealth_cam_stc-p12_manualotl4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384828/normal_6005440aa39a6.pdfIn PDF document text
    • http://obschee.xyz/nezisozinotovokexikb31u.pdfIn PDF document text
    • https://danifiwap.weebly.com/uploads/1/3/4/5/134585556/3157198.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454971/normal_6003dbdb36d75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383689/normal_60384c1e2ce68.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/gobalufop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478133/normal_602f615dd0403.pdfIn PDF document text
    • http://1eyvgo.xyz/waworedixejejaloxovih4ui1.pdfIn PDF document text
    • https://wafiludelo.weebly.com/uploads/1/3/1/4/131437380/wofekixewere.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/791785d5-7aa8-4781-997c-ea2d430e11a3/fadabiravagoxiruver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92c0de5b-d377-45d6-b734-4c32e7558d7f/69248975940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c14a92bc-bb58-4e65-8ef8-d536691f35ae/31676101873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3651bfb1-fa3e-4f3e-8fa2-ede8e4639797/reriguwajuragunu.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_off0000e756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE756 5216 bytes
SHA-256: f73f38825c211987f68cad5380f0d59639ffb258f534c68f0bdeefb6693ecf34
font_01_sfnt_off0000f913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF913 10592 bytes
SHA-256: 7b903c530e5c19270d2b2fa4fd4aae886e5d60016999d0d4ec2dc96c46eafed5

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