Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e52db790874c854…

MALICIOUS

PDF

79.2 KB Created: 2020-11-30 17:56:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8d83e78b1c7ee896387373eed701d88e SHA-1: 175985da6c4b62059fa2232db5b0b5515d21c300 SHA-256: 6e52db790874c854d17f29b77c68b473dea527b86eaadbd8bc74d71b0c52581d
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, a common tactic for SEO poisoning or phishing campaigns. One prominent URL, 'https://traffine.ru/aws?utm_term=absage+nach+vorstellungsgespr%25C3%25A4ch+formulieren', appears to be a lure related to job application rejections. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. No scripts were extracted, but the presence of many external links suggests a phishing or malware distribution attempt.

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://traffine.ru/aws?utm_term=absage+nach+vorstellungsgespr%25C3%25A4ch+formulieren PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f870c3b40779.pdfIn PDF document text
    • https://buvojitode.weebly.com/uploads/1/3/4/6/134630820/bomosoju.pdfIn PDF document text
    • https://jibabarudemafe.weebly.com/uploads/1/3/4/7/134748102/sufobedosa.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://static1.squarespace.com/static/5fc2c9392bbd74065812d409/t/5fc46501bc819f1cf4657266/1606706445573/zeveji.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf2fe9d104e5f152ce628/1606218495816/wikuwuwoxopukino.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4c874f98375720d6994c/1606372492484/dezodokasiwusa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd037c72f8b574a0f44599/1606222717031/95765303027.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc363b5c6d964583631f5aa/t/5fc513127acac6192a61f9e0/1606750996404/55835120902.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18f8d0a2757459be7919f/t/5fc42efc6457125654c059f4/1606692604492/4893421567.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/gelilijeduxivudevafekopo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06ecff7cf8c75402886b4/t/5fc163993570fb44d136aaba/1606509466366/consent_in_spanish_slang.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4a1e08845d0924807ea3/1606371870912/marijuana_botany_an_advanced_study.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/modern_calligraphy_guide_sheets.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc35f5bd49dd124474406bb/t/5fc4e21f5147b14804cbcc91/1606738465524/sarver_movie_theatre.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_off0000e6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F4 5736 bytes
SHA-256: d6e53f45510fcf3e5a6dc9e0a0fbe6ec478331180ad2de0d4a116ebe9c4246f0
font_01_sfnt_off0000f9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B9 11296 bytes
SHA-256: b4d2ba500f7e799568126b66dc2c4371845fb7690b14ab54f9face4dfdac61e7
font_02_sfnt_off00011ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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