Malicious PDF — malware analysis report

Static analysis result for SHA-256 23482011e41e2621…

MALICIOUS

PDF

69.4 KB Created: 2020-11-18 20:43:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a28746276a6ca224e73e12483101c8f9 SHA-1: 92a2fea2c24783b0333808d01c7b94e04c740229 SHA-256: 23482011e41e262131494ac7ce0bc3fc037bba56479b21863043347c0d22990f
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded links, such as 'https://gettraff.ru/strik?utm_term=witcher+3+how+to+use+adrenaline', likely serve to direct users to phishing sites or download further malicious content. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to exploit users through deceptive links.

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
  • 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.
  • 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.
  • 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/strik?utm_term=witcher+3+how+to+use+adrenaline In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381344/normal_5f8e6373c6aa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f9746aadf27c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385859/normal_5fa49750bbf6a.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/gewenibusifumoz-vulukevemeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379855/normal_5f8f42a28413e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5fa8784f5eeb5.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/aa1c8879.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/gupuso/edexcel_ial_chemistry_data_booklet.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/47942925875.pdfIn PDF document text
    • https://s3.amazonaws.com/taruzudov/lixokujenaregokeduw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17851ba7-a036-47bb-b8c2-01c418093507/50660746914.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/battery_low_sound_ringtone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4450b7b7-c735-48e2-9359-4cd2bbcdd522/figepijozupulefu.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/sebiru.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_off0000d333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD333 5296 bytes
SHA-256: 6b1debbcbd9bbfad241b7a2d3beea7c85f497ddbd03debf9bc1945fb8d60b162
font_01_sfnt_off0000e547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE547 10524 bytes
SHA-256: f0f42b0d580166d1ace9d45b58ac714a9c4a71c5a995f1f7a4bedac383631a82

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