Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac116cd44194cfe…

MALICIOUS

PDF

78.3 KB Created: 2021-03-19 21:30:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f0530e3bea0922799a4fa200420b4e9 SHA-1: 83b080b6ac857393b62dc46726313746fca313b3 SHA-256: 9ac116cd44194cfe452df8ac24c72d44ed3a0f14be4ed038f27dce65913c4a80
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 phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains text fragments that suggest a lure related to 'wood shack pizza', aligning with the phishing nature of the embedded URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=wood+shack+pizza
    • http://qrastenmap.online/rca_model_25425re1rp590.pdf
    • http://zoxodur.sportsontheweb.net/bss_coloring.pdf
    • http://gedirobidepud.scienceontheweb.net/why_did_the_subtle_knife_break.pdf
    • http://mesretly.xyz/470781110342lqdt.pdf
    • https://cdn.sqhk.co/lasesekov/2bwTZgd/brocade_switch_commands_cheat_sheet.pdf
    • http://yandex-dostav.ru/zasivoxij68oig.pdf
    • https://cdn.sqhk.co/rifelefiw/eihmjhB/77562753180.pdf
    • https://cdn.sqhk.co/fupokonabat/c1ggzmy/nasufogezotozoxunebago.pdf
    • http://mangalvpodarok.ru/58412468324hdsyn.pdf
    • https://cdn.sqhk.co/rufopunuk/hcJGgjh/etisalat_e_wallet_cashback_offer.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://11627308-8c8f-4f08-99ed-0ad85160907d.filesusr.com/ugd/682d1c_fc9e66bc370f4a4589f49894bf6401b0.pdf?index=true
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_7f4c4f37741e4e0d86f2070a0fa81dd8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4e88c7fa-c607-4c7e-9dd5-416ca5683003/duzepejowavaz.pdf
    • https://uploads.strikinglycdn.com/files/82504077-0f02-448d-89d2-e68612f0cfdc/is_elite_appropriate.pdf
    • https://d5aacb37-8766-4234-9cc8-c2ec3b911aba.filesusr.com/ugd/1e723b_2e268a533f424162b76e081e35eebe89.pdf?index=true
    • https://uploads.strikinglycdn.com/files/25fd7d4f-0030-457d-a74c-b04084d91323/how_to_create_a_website_using_wordpress_for_free.pdf
    • https://0e67983c-e844-40c9-b604-97311ec94efe.filesusr.com/ugd/6e13d9_caf7513d0e824ad9beeb256348a90b6c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/54fd24a9-9da5-4d31-82ae-ddb31b94643b/statistics_and_probability_book_for_senior_high_school.pdf
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_ea46298357064917b34f3c2249c35b37.pdf?index=true
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_258e891b526d4132a76e5f41c905a3c6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/357370ec-c0a4-4316-99bc-eb47180740a9/michigan_child_support_income.pdf
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_d2efd7733e314797883d59a90b3ce01d.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f262.bin
69d37701872fb7a77aa0542bf2a066f6de3d076b0510c5f683c02573cc8623b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF262 5160 bytes
font_01_sfnt_off00010408.bin
fc9a335381b54037a04e2a464b173f425cb4c4c06da78d2f9b719e1786eeed9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10408 11960 bytes

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