Malicious PDF — malware analysis report

Static analysis result for SHA-256 7122fee9186d17ce…

MALICIOUS

PDF

73.0 KB Created: 2020-12-21 20:56:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 542a9d6a7fcc3e251df68429fec9b0b7 SHA-1: 227e0648e212cc5bd2deab4d3b893ba91eea030b SHA-256: 7122fee9186d17ceb886a42db95c184a2bd3d1ba9aba7a5c74f2312d693361b7
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, with one prominent URL pointing to a site that appears to be a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/strik?utm_term=best+apps+to+train+your+brain PDF link annotation
    • https://gorofegi.weebly.com/uploads/1/3/4/4/134462705/5020476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403274/normal_5fc119536adb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376120/normal_5fa0a4a89e61f.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/kezemiradigu/adobe_photoshop_cs5_free_download_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/articles_in_english_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/format_json_string_in_notepad.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc191840a2757459be79fd2/t/5fc995c9822fbd3263d7fd9a/1607046601307/93767899634.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ce8ac6d964583621afbb/t/5fc3a956eaf37e3b640c2f49/1606658391396/the_curious_baristas_guide_to_coffee_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/bombay_film_song_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/extech_chlorine_meter_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/24269395024.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_off0000e08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08B 5072 bytes
SHA-256: 71b5ad296f97278fb246fa5aa157d71d6cee10f7e753b74e33fba401788f7857
font_01_sfnt_off0000f1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DE 11028 bytes
SHA-256: 02cd05c09e5ac99b3404c41b2c28de9ce232b1d18f0a300736cc50bff83b5024

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