Malicious PDF — malware analysis report

Static analysis result for SHA-256 28a2817ef2830d06…

MALICIOUS

PDF

70.6 KB Created: 2021-03-05 01:24:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 27754e707dac4541cdca643ebd8e1753 SHA-1: cf42f5b7bb4b74a7929c1cb46227c7784bb51848 SHA-256: 28a2817ef2830d0668710163c4ddadbb51a9d4ac4c4f4aee938339a89053b213
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to 'Spotify hack apk 2017', suggesting a phishing or scam lure. The presence of external URIs, particularly one pointing to 'kuzutuzo.ru', further supports the attack pattern of directing users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kuzutuzo.ru/wix?keyword=spotify+hack+apk+2017 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410674/normal_6002c78793afe.pdfIn PDF document text
    • https://cdn.sqhk.co/zowajomi/jc3zdUO/snapfish_photo_puzzle_review.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/glgh7hg/nenekofudeti.pdfIn PDF document text
    • http://wojesukuzak.mygamesonline.org/82047032361.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490132/normal_5fcc5caac6dc6.pdfIn PDF document text
    • http://wownatural.fun/child_care_near_me_open2x1u6.pdfIn PDF document text
    • http://lozuzaragujeb.mypressonline.com/xbox_one_wireless_controller_driver_windows_10_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://popaxaxi.epizy.com/moravisinum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a26beebc-72ac-487e-b4cf-b8e52a58cd2b/takaxowulik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79850c3d-d3f0-43be-8c06-a10b9a8ef62d/is_value_dead_1999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f583500-783f-48c4-955b-558227c3ae3e/26488858057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f819183c-4d32-48a3-a058-470ca2ef6fba/the_fallen_state_jlp_youtube.pdfIn PDF document text
    • http://tokafibalo.epizy.com/8709246739.pdfIn PDF document text
    • http://sogewom.rf.gd/for_dummies_guy_name.pdfIn PDF document text
    • http://timojodabemisux.myartsonline.com/spanning_tree_protocol_root_bridge.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_off0000d997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD997 5472 bytes
SHA-256: 3b043b1ba51ce4b5af2dd93f0d1f266090ef719cbaa658bfd173fad966a74398
font_01_sfnt_off0000ec52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC52 9804 bytes
SHA-256: 183f1791a0e7fb62549eef8a7a9d6bcd532acfd3b317d30083a1994b68944312

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