Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dfd239e270a89a4…

MALICIOUS

PDF

76.2 KB Created: 2021-05-14 18:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8155394079ddfb454b1c146e740582e5 SHA-1: 965d39029b45253c54df8d27e1356ded4f7e9c6f SHA-256: 4dfd239e270a89a49ccfa8919766bc7a539366a56ba4293dd84d0d5b95d38e7e
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 website related to a product battery replacement. This, combined with the ML classifier and ClamAV detection, strongly suggests a phishing or scam attempt. No scripts were extracted, but the presence of an external URI indicates a likely attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/strik?utm_term=liebert+gxt3-3000rt120+battery+replacement PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454161/normal_5fdf874c2299e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528915/normal_5ff1493b2921d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369149/normal_5fe3da80cbf91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379485/normal_5fd8a1e411cea.pdfIn PDF document text
    • https://cdn.sqhk.co/mijajijem/HglkPgg/zagzig_endless_zig_zag_games.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418171/normal_6058b5ea27e09.pdfIn PDF document text
    • http://hot-money.fun/timoxizoselijkqemv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421639/normal_6026a943643d2.pdfIn PDF document text
    • http://pressit.space/7499399107b7sbv.pdfIn PDF document text
    • https://cdn.sqhk.co/kiribikiv/fzF0iaT/51228201360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382782/normal_601234dd0ea53.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuzasana/lnha3dS/43089779113.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad934fd-ed7b-4969-ad71-6dd9949df924/zumiwezasusefubulezuk.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/b._ed_entrance_exam_form_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c2da0dc-d264-4633-94ba-28a55d8657e2/66258842748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb6260d2-69af-4fde-a8e5-f7122063b2c8/war_of_the_worlds_2020_watch_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/35869625944.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/46479053862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/685f9334-13d7-45d9-a0d6-fb5fe0a28d60/5107541367.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/how_to_order_mustang_mach_e.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_off0000eb26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB26 5848 bytes
SHA-256: 6eb158cac61161a1958b6e3bd0b42a2979df5cfda99a3664c2105ae77da459eb
font_01_sfnt_off0000ff22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF22 10624 bytes
SHA-256: 967d1cac1b095af993ec13de4482e29960d4a6ff53c17bdc503d21d8fd3cf613

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