Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae338a7cf65e5a9d…

MALICIOUS

PDF

85.0 KB Created: 2020-11-26 23:34:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6661e634878411f8feff0f30d9525a10 SHA-1: 1b9208e2a02bcfb7697f5a189710dd4db1cc7999 SHA-256: ae338a7cf65e5a9de9ff666967532ac07d57787e4e0bfeda92aecc873c019e5a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical finding for requesting recovery secrets. The embedded URL points to a suspicious domain, likely part of a phishing campaign. Although no scripts were explicitly extracted, the document's nature and the ML classifier's high confidence suggest it is designed to elicit sensitive user information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://trafffi.ru/aws?utm_term=android+studio+building+apk+file PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379241/normal_5fa6617d46e77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368998/normal_5f878cf23bca8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476150/normal_5fad709d65e91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413986/normal_5fb9f458ce38c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379961/normal_5f9877d3e3d9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5f8b4b9f3ed48.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/247246e4-1c82-4b3e-aca1-405fb40c8719/70435616747.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/78742121890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2eebe30-f4a1-4082-a01e-bd82a4427483/17196227412.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/simple_guitar_tabs.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/vodibigomiwivelipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/071d1e9f-5d94-4dbf-92ca-c7275df23160/59058128212.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1809ffb-cd6a-4331-b477-caabc4382a2e/miwapuwexevebux.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000feec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEC 5284 bytes
SHA-256: 6089198e74482b9746d0e073d1558d4fb06ab606f87e8b8435d87805e4efd201
font_01_sfnt_off000110ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EE 11660 bytes
SHA-256: 42c489c508d1d83bb787d693c5dc80f4525acb06f726a595b242fdb9b038f960
font_02_sfnt_off000138bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138BF 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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