Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed11d607e5a6bb2…

MALICIOUS

PDF

69.8 KB Created: 2020-11-12 21:49:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a4371e31a4025c90e8fbb096f7829cf3 SHA-1: e89b550445880fee7cf33f6affd1827d74e5e65f SHA-256: 1ed11d607e5a6bb21bb968f0861a0fbb7f87c4c034da4ed094030596d3d90c03
96 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 containing an embedded URL that leads to a suspicious domain, identified as malicious by ClamAV and a machine learning classifier. The document body, though heavily obfuscated, contains text related to "Inf security templates" and the authoring application, suggesting a lure to a phishing or malware distribution site. No scripts were extracted, but the presence of an external URI points to a likely phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=inf+security+templates PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421957/normal_5fa49ef6c0142.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454280/normal_5f9f824d69a73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_5fa2e40bcb0ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384825/normal_5f91f431b389f.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://s3.amazonaws.com/vixuwogetiv/11811912759.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8efd7e74-476a-47a9-afcf-b1319a0e5c7c/lords_of_magic_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02000570-67d5-4459-ab65-6e6e6088767e/jorafirex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d22276b-f2ca-49e3-9dd3-dc0b7c9df432/98614347259.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/harmonic_convergence_2020_july_14th.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/demorolifuvaloluvepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/457cb3f8-f98d-4518-9076-efd8a99b6721/99558705686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95467c92-2ec2-40f4-bb38-0eeab66ee96c/banidikejasivemovulakux.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_off0000c915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC915 4972 bytes
SHA-256: 8102e1e1b77a40d15780d80ed99d3879a8a9b2dec19bbf60c9ddc57e62413be8
font_01_sfnt_off0000d9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E2 10184 bytes
SHA-256: 9d10319d70805276c6e8416a74b4e80b5e9a8674408022bd4fe6278d4c8d961d
font_02_sfnt_off0000fc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC90 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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