Malicious PDF — malware analysis report

Static analysis result for SHA-256 d358fa286601116f…

MALICIOUS

PDF

179.8 KB Created: 2021-03-08 22:42:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a15f27078da5a2caa30db94f533ee209 SHA-1: 21c12d68a512a2c99cf472a6a5371501fa9718b6 SHA-256: d358fa286601116ff871f4b64c663ca991b860ddff091a9f6ce256a857ca3ba0
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the embedded URL is the primary indicator of compromise, likely leading to a phishing page or a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=offshore+fishing+report+emerald+isle+nc In PDF document text
    • https://juzunuxav.weebly.com/uploads/1/3/4/3/134316531/0d6b300e41.pdfIn PDF document text
    • https://xakepimefinawam.weebly.com/uploads/1/3/4/9/134903333/4479166.pdfIn PDF document text
    • https://kozewililusu.weebly.com/uploads/1/3/4/0/134013002/zejenetimabola.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/reviews_of_keurig_mini_plus_brewer.pdfIn PDF document text
    • http://ferategaj.scienceontheweb.net/magnavox_dvd_recorder_vcr_zv427mg9.pdfIn PDF document text
    • https://fojanatixisi.weebly.com/uploads/1/3/4/2/134265346/tubikuwizu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/90864426940.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/alitalia_mobile_check_in_android.pdfIn PDF document text
    • http://dupizorof.rf.gd/top_100_picture_books_2020.pdfIn PDF document text
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_58487859d5ff42f88747da623ab82621.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/puwidolewujajedid.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/54871869668.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/31108107310.pdfIn PDF document text
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_b848ec42c6c9455a9687033bb07b4e68.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nigimul/what_organizations_help_stop_human_trafficking.pdfIn PDF document text
    • https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_36df64fa955a4385b09dcd5e29e5eb1c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xozeb/89079988728.pdfIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_3265ddb48e1a44ccb97ae66f3febe2b9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gezetega/restroom_pass_sign_out_sheet.pdfIn PDF document text
    • http://rezutapigad.rf.gd/1770542898.pdfIn PDF document text
    • https://fdb4f28e-c637-431f-967d-457feef73efb.filesusr.com/ugd/cf5aa9_651354110ace4c35995f5042d5b927d7.pdf?index=trueIn 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_off000286b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x286B4 5596 bytes
SHA-256: cc16ed5aae597eef1d5cda235b8f632c20b550822e05661d9a0104a2901914e7
font_01_sfnt_off00029991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29991 11640 bytes
SHA-256: 69f3b300a500564d26f8b1afa2277bb277117703a64ddc8dc0a3703c518ecebc

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