Malicious PDF — malware analysis report

Static analysis result for SHA-256 6732a4040859b811…

MALICIOUS

PDF

75.8 KB Created: 2020-11-25 14:47:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7e033c2b745e7e0b46fd951a6978ccb4 SHA-1: 17e99b78f2e3c36c8b889a2158d6aa17e2c48c89 SHA-256: 6732a4040859b811413796ef188137e697862fd63b0788234b8fb73e6d40a6b0
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 to known malicious infrastructure and a ML classifier. The embedded URLs suggest a link farm designed to redirect users to potentially harmful content. Although no scripts were explicitly extracted, the PDF structure and embedded links indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=chapter+13+physics+study+guide+answers In PDF document text
    • https://fifuvagijoserag.weebly.com/uploads/1/3/4/6/134606646/dapajera.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/6cb6ce4f-1662-4825-bcc1-06df750f2cd8/14556458034.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/63884152733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b19b117-ffef-4250-95c9-dc7eb1331273/wuwewukazepeledevapak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bab57d6-4f2e-466f-8eda-985ccd156d72/2239522561.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/nuxisapaxopadulizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97c01dee-cd28-40cb-9401-83e050141ce1/curso_de_refrigeracion.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/15068568539.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/a_practical_guide_to_dragons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c4659f8-6761-4ed0-88cc-7054aabce078/jozaveramakupaz.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/bezizadepogenem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cd7c91c-45f2-470a-9b64-140c344a5a86/how_to_knit_fingerless_gloves_on_a_r.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/kubopige.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/24956668634.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/banana_dna_extraction_lab_report_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/night_comes_to_the_cumberlands_by_harry_m._caudill.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f407e81c-fb2a-453c-bc8b-ada083d8665d/3.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_off0000e61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61C 5616 bytes
SHA-256: 9d070ab9c6da51350c127bb00cb83f6e3fbd0c821d1af314acecd30cf41acbc2
font_01_sfnt_off0000f943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF943 12508 bytes
SHA-256: 98adb068f0fdf54aa749317d8bb610fad0d19c844f03869e0d862aa9c224a8d4