Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bd9cbe574c417a2…

MALICIOUS

PDF

70.4 KB Created: 2021-03-16 18:07:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c334bf07e09ddfe85a35da1493ccab4c SHA-1: d63e5cff7d436f8f64c683705f7666766d3c789a SHA-256: 9bd9cbe574c417a2a921787386cc54512792f63ebb61a1e2eafa676138adaa16
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to an 'osmosis practice worksheet answer key', which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=osmosis+practice+worksheet+answer+key
    • https://kuwugexikoxol.weebly.com/uploads/1/3/4/7/134718068/jogugufuwaw.pdf
    • http://tonevagewalilu.medianewsonline.com/crysis_3_crack_indir_gezginler.pdf
    • https://livadekawa.weebly.com/uploads/1/3/5/3/135317457/xunuwovunuz-dataluxevijaw-fuluwonowafi-jobujetig.pdf
    • https://cdn.sqhk.co/zanivuwiduvo/ibZjbii/slot_machine_repair_service_near_me.pdf
    • http://saniwigudovo.scienceontheweb.net/barron_s_toeic_8th_edition_free.pdf
    • https://static.s123-cdn-static.com/uploads/4428052/normal_6000b2a4d2038.pdf
    • https://zobilajes.weebly.com/uploads/1/3/2/6/132682335/699c8.pdf
    • http://kugaraginoja.mypressonline.com/51973556286.pdf
    • https://cdn.sqhk.co/kajipazuto/iaLtHJa/cowboy_game_today_injury.pdf
    • https://cdn-cms.f-static.net/uploads/4404757/normal_600b5eda3818d.pdf
    • http://wogivodugakovek.mygamesonline.org/50015461950.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/luxaduzimase/xineporafupamagup.pdf
    • https://s3.amazonaws.com/vapelurowar/amazon_platform_bed_frame_queen.pdf
    • http://badamowafe.onlinewebshop.net/kukifefatugazitodubiromi.pdf
    • https://uploads.strikinglycdn.com/files/b52cf0ee-3c37-4d33-93b4-b42ba2c89c92/baby_name_books_2020.pdf
    • https://uploads.strikinglycdn.com/files/3882cd04-2b61-43e9-8a77-6a6397491456/how_to_negotiate_your_car_lease.pdf
    • https://uploads.strikinglycdn.com/files/ab339bfd-8dee-43d0-9bb0-e452b7fbfe88/unication_g1_pager_belt_clip.pdf
    • https://uploads.strikinglycdn.com/files/b827d1bc-2538-47a9-83a0-69b44149ed3a/dafevajerubovulafagijosu.pdf
    • https://s3.amazonaws.com/gopuze/common_sense_questions_and_answers_in_english.pdf
    • https://uploads.strikinglycdn.com/files/6fc0ea9c-15b8-4d5b-9825-61721d78ca98/crossfire_series_-_google_drive.pdf
    • https://s3.amazonaws.com/kimone/72670553298.pdf
    • https://s3.amazonaws.com/pululusodogi/totitevugolajawukam.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d691.bin
2bcf6b6f512bc0cc714240d6ad268548bf622a38ed2c3bc673c6dea8cfbc55f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD691 5428 bytes
font_01_sfnt_off0000e8ec.bin
c36746f478383178dc9bef3546195cbd8cc892badecba41c2c7fc9b12172bd94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EC 10416 bytes

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