Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b9f8ffddb47a2f…

MALICIOUS

PDF

71.5 KB Created: 2021-03-28 21:32:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e9a1fdc69a6b2f442f241263330b3652 SHA-1: b65567c10c3313f25cd236aa566515eb8c39dfc8 SHA-256: 72b9f8ffddb47a2fe60897ad2c7db2f8643ba4fd75f7e2b5de981e19104d1013
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URI pointing to a URL that promises a free PDF download, which is a common lure for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jottigo.ru/award?keyword=idioms+and+phrases+with+meanings+and+examples+pdf+free+download PDF link annotation
    • http://mapotilij.mygamesonline.org/bajamafat.pdfIn PDF document text
    • http://kimidenexikox.getenjoyment.net/comment_draguer_une_fille_sur_facebook_exemple.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379035/normal_601b80f04dc8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447912/normal_5fdae46e288fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382772/normal_60032d0f96c03.pdfIn PDF document text
    • http://zuwujamoruwipam.22web.org/29905896665.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474734/normal_6002e1ceb122e.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/aleister_crowley_magick_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_603efdc9759e8.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/dbd778c3-433f-4e46-91f3-f3338cd59e1d/first_aid_step_3_latest_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/xubimigawilerurekedoputel.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/how_to_open_paint_in_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/affine_space.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/96630396412.pdfIn PDF document text
    • http://lefowusutufofap.epizy.com/object_oriented_software_construction_bertrand_meyer_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/how_much_4k_content_does_directv_have.pdfIn PDF document text
    • http://pumamolo.rf.gd/31644833182.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/surprised_pikachu_meme_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe1f2eb8-3e79-441a-bdf1-a295612647b9/mosasu.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/nobalenesavaxitevegixepax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bf3ba15-9bad-4cd7-a5be-f4696747e2b6/16305970783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/261015f5-906e-4a05-895e-861a859cefee/schwinn_fitness_130_upright_bike_assembly.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/wd_tv_live_streaming_media_player_disney_plus.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_off0000cd49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD49 5340 bytes
SHA-256: 94763fa8e2b5a394a7c6ffcd87f0e5e35e74e4065d04e02c45b8e73224a58f9c
font_01_sfnt_off0000df58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF58 10192 bytes
SHA-256: 7115c7ce37b603576b2e146992345d82d41aaa40041735dbde9409772bd6c1b9
font_02_sfnt_off000101c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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