Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e0bc012f30f145…

MALICIOUS

PDF

64.0 KB Created: 2020-11-26 15:48:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5c9886476309d580ea64ce20f4ddac2d SHA-1: 2895f1df32b84d71791193e4b773cd8daa6ff24f SHA-256: 31e0bc012f30f145f88d01fa954fc82ab1ebc26b7fb07ba7b61acdc46e52e012
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a .rar archive. Heuristics indicate this is a callback phishing lure, suggesting the document is designed to trick the user into interacting with malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://traffking.ru/aws?utm_term=bypass+9-+2016.+rar PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/29680082543.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/aptitude_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/wijipejozaguwosaxunovij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dad8144-3858-4be3-ab34-72a38d9f6f56/dd_3.5_ring_of_feather_fall.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/15061023154.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/wrinklers_cookie_clicker_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/langston_hughes_facts_about_childhood.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e84a761e-57ce-47a7-b49b-d8e974620454/wapakosabekogevazofop.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/gikopekapefuxuxodomip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce368071-b90f-4986-9f88-900e696e9594/11180206912.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/sharp_aquos_quattron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e00e5c90-b38e-4370-9c2c-18946dddaeb8/pegaditu.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_off0000bb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB02 5632 bytes
SHA-256: 2f52ccd78ab1a37fb306ddbe1a726e4dad7bac3229d84bbc520a9090e7f1deff
font_01_sfnt_off0000ce55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE55 10948 bytes
SHA-256: 8110b436f6831c195c8a4c869f3c2a29e2cc786d5adaee5af55cce4ee46718ee

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