Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1fafcba09566819…

MALICIOUS

PDF

70.0 KB Created: 2021-02-07 12:50:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c36e789571e4c1a6dc5b76a4446d743b SHA-1: 211f9d8e702f83cf370f5dd332c0057ff99c9604 SHA-256: f1fafcba09566819abcc59b34cca490afc54ce0a75418da8080ee1059ff1f2ad
96 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 as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wb?keyword=ac%20dc%20highway%20to%20hell%20%20free PDF link annotation
    • http://chambreop.xyz/clothes_and_accessories_vocabulary_worksheetsn4i7x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487623/normal_600fff77978f9.pdfIn PDF document text
    • http://stakingyfi.com/easy_homemade_face_mask_for_acnemcizb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495385/normal_5fc88c51378c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382413/normal_5fd07d4071c4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475588/normal_600506eb70965.pdfIn PDF document text
    • http://dasiroxejipi.22web.org/lupawizirak.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/9S1f9hh/t-_34-_85_wot_best_gun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382793/normal_5fcbefebc27e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416305/normal_5fdbe63919bbb.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/fosawef/96919064878.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/jizozeporapem.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/ford_antenna_font.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/19420669018.pdfIn PDF document text
    • http://wereguvepowu.epizy.com/ceramics_engineering_materials.pdfIn PDF document text
    • http://mevonaku.rf.gd/furakalujiwolobuwilivo.pdfIn PDF document text
    • http://veridipu.rf.gd/avery_label_templates_for_word_l7165.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_off0000c566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC566 4968 bytes
SHA-256: b18314d0358b876b800d391cb231bfc8941cb2f6df0c5f25e42f7d2e3d449f50
font_01_sfnt_off0000d66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66B 10988 bytes
SHA-256: 9dab4edcb4e1758af1e90a0fe2d26d616cfcd4d23833afcaf23349c84259876e
font_02_sfnt_off0000fb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB43 4324 bytes
SHA-256: 781b9fae2fb9201b4a05d2041fea553bb2973f1d011ab9c51e3326c72e342c60

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