Malicious PDF — malware analysis report

Static analysis result for SHA-256 73eaa2213651be6d…

MALICIOUS

PDF

70.1 KB Created: 2020-12-22 13:43:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a818b9b8eeb48118ccce3b493873bc66 SHA-1: 17e62238d8d2dac857000c23f8b975f9ae6c2b4d SHA-256: 73eaa2213651be6d676696feb3d3f1cbe2752c21ee40e6bb686bdb2eba53b03e
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is a PDF document that contains a link to a suspicious URL, identified by ClamAV as Pdf.Phishing.Trojan. The presence of a 'download button' heuristic and the URL itself suggest a phishing attempt to trick users into downloading malicious content, likely related to pirated software. The ML classifier also strongly flagged this PDF as malicious.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/strik?utm_term=ea+sports+ufc+2+pc+download+utorrent PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408184/normal_5f9353fb42ae4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444358/normal_5fba7587816df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414491/normal_5fc60a31c1748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383131/normal_5fa1fad434436.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/62ac8e62-4e38-41b2-bd61-d4a55636148d/49444348515.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c05eb8467722f1ec93c2/t/5fc50b7008845d0924294028/1606749041996/nefekozadafugasud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a62b645-3fea-4aed-a6e8-d5c1ec7cab27/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22cdaf59-e1ad-4c47-b66a-8f16952a4f89/94440378397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c6bb55c-9534-492a-881d-e702a3a368cd/personal_hygiene_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/80155328517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/894307ad-3301-4bea-82ad-28ac220cb38b/wajuwokeninererog.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce48d52cf4ad19c3ac5f73/t/5fd6c7d1481cfa31add73a1e/1607911377989/37284104514.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_off0000d468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD468 5332 bytes
SHA-256: 43ab9ab81e95247bb72417624a1122970444739e8dbacfd46de054448f8e3d8b
font_01_sfnt_off0000e6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B3 10648 bytes
SHA-256: 3cc41fdab118e684ad1741bb302182163b66ae9f3b77a0b2227a3f94094f8bf3

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