Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca0ee8a6f5985705…

MALICIOUS

PDF

69.0 KB Created: 2020-12-16 03:47:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2c7be875732ec44fb878fb4c32170139 SHA-1: e73925ca28919a413581da1d6dacad75d9992097 SHA-256: ca0ee8a6f59857051c14ce88cee4d4f2033448cce45dbef7e47737ae992a04bd
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting a phishing or malware distribution attempt. The presence of numerous links, including those to S3 buckets and other hosting services, indicates a link farm or content aggregation strategy to obscure the malicious destination. No scripts were extracted from this sample, but the overall structure and link distribution strongly suggest a malicious intent to redirect users to harmful sites.

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/123?utm_term=super+smash+unblocked+games+66+at+school In PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/rejetidojukes-fuvejapupe-ruluxoxivek-xofavigunof.pdfIn PDF document text
    • https://bupifepubeweta.weebly.com/uploads/1/3/4/3/134336259/e31a7e481475f8f.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/rizijubovapuk/75724197759.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/adarei_palenna_music_video.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13c726609fd0ee793905a/t/5fc72fd76beae45431615d27/1606889433016/83435510818.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/acta_constitutiva_asociacion_civil_mexico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17f9c7f0-6b30-4e73-8b75-7ea699a9c964/62069253784.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/44593500441.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/ropef.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd2c30b6b03258f2f7c3b/t/5fc6b1f29ee0f32b8741b286/1606857204216/61042456530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b610e427-1d33-45af-9edf-e9d9b5323cf3/world_modern_history_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/application_for_criminal_indigent_status_florida.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_off0000cfa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA4 5948 bytes
SHA-256: 3d8b43555ae194da4202d654ed601c9a31c7aa58df9a87ffc22883c7616a89e6
font_01_sfnt_off0000e3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AF 10364 bytes
SHA-256: 6eb85340b371ffd0d671a9ba7f39c804b15e9d4a5580be7e0fec0903683a8dfa

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