Malicious PDF — malware analysis report

Static analysis result for SHA-256 85bd1d8d0adcb18e…

MALICIOUS

PDF

72.6 KB Created: 2020-11-11 17:18:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c59a7a1a580e2e388d7832071548ba5c SHA-1: e09cd086b926646489495aecc9ab3db206c1312b SHA-256: 85bd1d8d0adcb18e8efb4cfe104edd345780cf251affc8d114b305c3bf3bd7bb
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://gettraff.ru/123?utm_term=daniels+running+formula+pdf'. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, but the embedded URL is sufficient evidence of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gettraff.ru/123?utm_term=daniels+running+formula+pdf In PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/vulefebuz.pdfIn PDF document text
    • https://kiligazifozu.weebly.com/uploads/1/3/4/5/134506598/tewedoluzosati-muwevufigolisa-letut-fomape.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/bebugazijaba-zoxiz-jivazomifikebaf-zogime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_5f8754cd3209b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383470/normal_5f9f43f40afb1.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/71890f68-e70c-4b62-9acd-b8787cb54d9b/chris_brown_indigo_download_zip.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/coady_photography_churchill_downs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e309a776-fc38-4a37-bf52-186df4d9fb78/37259048285.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/define_work_life_balance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/071c699e-1208-4e25-8984-5d2521648ac0/lepomaba.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D8 5360 bytes
SHA-256: d4436b776ed65eb10724dcbdb7a7b2a0de555a6bb9828cd2a974a07ef84d78d8
font_01_sfnt_off0000db01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB01 10668 bytes
SHA-256: c97654c62c7b741b0cc3f54e4d039b4845dc7397261cb65a2eab3163dae8291a
font_02_sfnt_off0000fec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC2 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

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