Malicious PDF — malware analysis report

Static analysis result for SHA-256 032eb2b32097fea4…

MALICIOUS

PDF

80.3 KB Created: 2021-02-27 19:19:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3e7db3c4edeb118c6d620a2c0c6db642 SHA-1: 8a60ed3fcd768e71eafbc09f23264c35ea7981e9 SHA-256: 032eb2b32097fea4334802c5ab25fb6297a2f6160fe93077b0eff977eb29f882
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/123?utm_term=milady+cosmetology+book+2020'. This URL is likely used to deliver a malicious payload or phish for credentials. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL in the document body is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=milady+cosmetology+book+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402262/normal_5fd27bb12e287.pdfIn PDF document text
    • https://cdn.sqhk.co/rufosopufu/fZjBNii/vr_space_calibrator.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/2xRLjBm/2d_strike_latest_version.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/Nehijhb/solar_system_planets_saying.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420454/normal_601e249f1ca94.pdfIn PDF document text
    • https://cdn.sqhk.co/jasamomedam/Yihhehd/16395279534.pdfIn PDF document text
    • http://greyfruit.space/lepoviveduxolibegomigit3qvhd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492529/normal_60063393eece8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493589/normal_5fdef06408972.pdfIn PDF document text
    • https://cdn.sqhk.co/nawakema/eFjbggN/tmnt_rooftop_run.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425916/normal_60077045ce786.pdfIn PDF document text
    • https://cdn.sqhk.co/gutifusuf/haVghR9/meporuvuzipekiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502817/normal_5fca4c116fd9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381347/normal_60159f5b88c86.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/dudurat/classic_wow_hunter_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/mupaxelabi.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/buoyancy_principle.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_off0000edfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFA 5428 bytes
SHA-256: e43256522233524079a8cdd96198cd92f60a3989e16bb0718a921a2656b5eaaa
font_01_sfnt_off00010089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10089 11032 bytes
SHA-256: d211d7a70e9f402129539ead817689e964f47b53e83baaaca43d3e7a62ab9ba7
font_02_sfnt_off00012644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12644 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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