Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d5923f75868a321…

MALICIOUS

PDF

75.3 KB Created: 2021-04-01 23:49:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f9d0fdc688b731f7e8d0cb5a0b280a96 SHA-1: 24abdd20ffbd7062b4b6309c36fcef7b4290702a SHA-256: 5d5923f75868a32192a831967b043b4a7277fd2c1fd79d25673f6f4471d9762d
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 URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to exploit users by directing them to a malicious site.

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://bologen.ru/strik?utm_term=how+to+row+crossfit PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482863/normal_5ffa86121b69d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421217/normal_602a42cf27885.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387709/normal_5fcfadc27e759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488817/normal_600f4f0a51762.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488809/normal_60083a03e2632.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451039/normal_5ff49a57d1848.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_604ca5651615d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418968/normal_6056ed0a9ae92.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/kudowo/does_disney_world_have_a_dress_code.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/why_is_my_samsung_tv_screen_blank.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/67620691852.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/square_root_of_218_in_radical_form.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/34844632019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab7fd89-5775-4bd7-ae75-fd874b5b9f9b/what_is_chemistry_easy_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/driver_stampante_brother_mfc-8950dw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4518e34e-fe19-4478-bf4f-1df019a54a73/11415265202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72bf35dd-8bba-4d90-b3a9-404b22620e3c/udi_u818a_drone_with_hd_camera.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/bebimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30641c15-415a-48c7-ae0f-b80a69a3f3f6/54092457615.pdfIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/what_is_12_stone_12_in_pounds.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/bonjour_tristesse_telecharger.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/21678664420.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/critical_ops_mod_menu_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ba41c02-df59-4500-a10b-64661cef72b0/best_crochet_stitch_for_chunky_yarn.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA6 4684 bytes
SHA-256: f2f3952fbcc405f9a3fe0f0e8f226e29ff56f388edbc2d5799a1c46ee4f0c5ef
font_01_sfnt_off0000fab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB7 10488 bytes
SHA-256: 410c86a1133247533b04d2c0cac7ed1e18abe0246eb34676d1c97b01b9be6bf8

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