Malicious PDF — malware analysis report

Static analysis result for SHA-256 21eaa96ee9b0435b…

MALICIOUS

PDF

66.8 KB Created: 2020-11-23 16:43:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d029a0ee5a899e2ec492ab0262246a83 SHA-1: 37da95034b38fe029392700efd36c674dccac36c SHA-256: 21eaa96ee9b0435bf1bad1489d9647a67282b5d6ab3761924d176054099ee570
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to known malicious redirectors or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to free downloads, reinforcing the lure.

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=kattipudi+kattipudida+mp3+song+free+download In PDF document text
    • https://wunogalet.weebly.com/uploads/1/3/4/8/134891918/9563986.pdfIn PDF document text
    • https://reredutubonuki.weebly.com/uploads/1/3/0/7/130775370/3003565.pdfIn PDF document text
    • https://folugaso.weebly.com/uploads/1/3/4/5/134503816/26c8f1f96d34.pdfIn PDF document text
    • https://jejaxome.weebly.com/uploads/1/3/4/4/134443668/8f0024ad06b9a3.pdfIn PDF document text
    • https://duzigavejad.weebly.com/uploads/1/3/4/5/134513143/dolesez.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/c7e6cb17-7281-40d4-9e9d-f1c89da8ae20/jokes_for_teens_at_camp.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/36318785345.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/device_spoofer_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/9451502100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b66c7c-67eb-4e75-97f3-092ed8b686e8/xokokizilolabogatof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6276d87b-3c59-4dc3-87ea-c1d017a14528/i_love_you_in_pangasinan.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/breast_cancer_awareness_flyer.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC796 5652 bytes
SHA-256: d7b338b5ef8ea0e6d725a4bf7e75e668c8e399040134d0c80e0423a1488a9df9
font_01_sfnt_off0000dad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD7 10420 bytes
SHA-256: c019e7869de9794179e48d5a62f24b5d591ce537f0597063f821f35f3e5c85e6

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