Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5fae2ab10743649…

MALICIOUS

PDF

104.6 KB Created: 2021-03-12 16:43:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35919223f5a09674c8fc3b2cc6978196 SHA-1: 708ebe3d8862661f9dfb60e31aad45cde1c140c8 SHA-256: f5fae2ab10743649155849c8bf129fff2e448e5b8c32246bf74f66d35859f348
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to redirect users to a phishing site. The PDF structure and embedded content suggest an attempt to disguise malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/wix?keyword=sojas+wagle+college
    • http://tulavesew.getenjoyment.net/20889216017.pdf
    • http://betijeduw.getenjoyment.net/diragotasunononanenuk.pdf
    • https://cdn.sqhk.co/bilanogakiw/jfricw5/kazusozoraxeludasuxob.pdf
    • http://dabopoxele.getenjoyment.net/best_loop_knot_for_rope.pdf
    • http://fosireditoj.mygamesonline.org/tutanusukimoneb.pdf
    • http://koxelovanalimu.getenjoyment.net/zowiwenuwofokuvu.pdf
    • http://kakolamilasaru.medianewsonline.com/bowflex_pr1000_home_gym_system_review.pdf
    • https://cdn.sqhk.co/jarogofef/d8llCCx/67607118124.pdf
    • http://xemokajoled.medianewsonline.com/bafekosome.pdf
    • http://tenipimutav.mywebcommunity.org/adverbs_of_manner_esl.pdf
    • http://botavubapisod.mywebcommunity.org/google_chrome_website_als_speichern.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_588defdfa8c04ee1910376bbb21d0ad5.pdf?index=true
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_8d6f97591e2c42aaa41076557964c3d5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3c6d9b98-acdd-4130-8108-8ae90c887537/how_to_connect_yamaha_hs7_to_tv.pdf
    • https://uploads.strikinglycdn.com/files/60267267-91a1-4a96-8e07-2073e4549b79/yunus_cengel_heat_transfer_download.pdf
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_a43d46860fcf4dea95b9df5fbd3bddd1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2ab73fbe-34f2-416a-a1aa-8970e572c2e7/city_of_heavenly_fire_hardcover.pdf
    • https://uploads.strikinglycdn.com/files/190c2a77-547a-4e2a-8a0e-9e524a5a0742/livivito.pdf
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_24aa76c188364121a3710a465b32ec59.pdf?index=true
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_b3a99cb356e64b31ab6cddf99175bce6.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001523b.bin
3fcf3f7d1cd8a6a8985896680b58dadfa05494470bc404c0bb1d1c74b01d948f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1523B 4696 bytes
font_01_sfnt_off00016248.bin
6016be13e37352a341c5f32e07337e68774afbfbd5ebd741deeda9c98ec28e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16248 10892 bytes
font_02_sfnt_off000186ff.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x186FF 4324 bytes

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