Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe848aef4c50275…

MALICIOUS

PDF

73.0 KB Created: 2021-01-11 19:14:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f154bf64a04d5690a7a6dff395997f9d SHA-1: d3e7b69090ba5ae8a5cfbfb57a383e0ff8d105fd SHA-256: 7fe848aef4c502751859f2b0ef87a747c8bbfb093a3e70babd6d2f59d43a9403
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 a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://traffset.ru/aws?utm_term=villain+bengali+movie+720p+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419412/normal_5f993b7e1356d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477173/normal_5feb4f9a970e6.pdfIn PDF document text
    • https://tukuboxux.weebly.com/uploads/1/3/4/5/134510407/2239390.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443809/normal_5fcc7255dfe13.pdfIn PDF document text
    • https://motikefivenigem.weebly.com/uploads/1/3/4/7/134709332/revimev_pebikokifur_luminosipovix.pdfIn PDF document text
    • https://site-1178208.mozfiles.com/files/1178208/ratujutufazuren.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384644/normal_5fa85a450741c.pdfIn PDF document text
    • https://site-1168144.mozfiles.com/files/1168144/real_car_driving_experience_racing_game.pdfIn PDF document text
    • https://pugofadunenem.weebly.com/uploads/1/3/4/7/134727284/duwixipolelemonumo.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/perurulexi/95630731741.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/safagegedimazafaxowozokim.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/posowisijobejolaxenomum.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/showbox_onto_android_box.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/fuwakupikonazamarufedilo.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD017 5564 bytes
SHA-256: 720f52a640907ec2326bbbe9827a0448af5f0dd88e10b0e7becd21b785202ecd
font_01_sfnt_off0000e304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE304 4376 bytes
SHA-256: 747c28ce503d98b9721620c0057839c727bfe69275cb62a9138812ec574ab928
font_02_sfnt_off0000f110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF110 11180 bytes
SHA-256: 4d654b96732991991809c3c62e56c686a74f3a18885911af1b2c98d806c9708a

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