Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c283b1e8da3fc3f…

MALICIOUS

PDF

77.8 KB Created: 2021-04-01 21:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e34fd4f019f2adbfb2af89c17c719a3 SHA-1: 488296b67aea19f35ec4ab7bcdabd83d74835ae3 SHA-256: 3c283b1e8da3fc3f0185c6488a8458165a2d0c0c690aa4554041385a6416ddaa
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, and contains an embedded URI pointing to a suspicious domain. The document body, though heavily obfuscated, suggests a lure related to 'modular belt conveyor pdf'. The presence of external URIs indicates an attempt to redirect the user to a potentially malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/award?keyword=modular+belt+conveyor+pdf
    • http://stassikorskyi.com/afpsat_registration_form_2019e7vxe.pdf
    • http://wotidoteked.mywebcommunity.org/7780954396.pdf
    • http://zakosemej.mypressonline.com/budget_process_in_local_government.pdf
    • http://remont-pc.website/vinapuxq4iu.pdf
    • https://cdn.sqhk.co/zibavuna/idheVhf/lalimijenakurevope.pdf
    • http://lazujifoxupa.getenjoyment.net/58060743854.pdf
    • http://kikababono.mywebcommunity.org/cbse_ctet_question_paper_2020_download.pdf
    • http://romeita.fun/primary_cell_culture_protocol1vi1s.pdf
    • http://bagutoruramig.mywebcommunity.org/biodegradation_of_crude_oil.pdf
    • http://xovitixekewelom.scienceontheweb.net/full_forms_of_computer_abbreviations.pdf
    • http://miribut.mywebcommunity.org/janiwolomug.pdf
    • https://cdn.sqhk.co/fusajovogi/fsNgipp/tobej.pdf
    • https://cdn.sqhk.co/nawovoso/yjjidhh/block_breaker_deluxe_apk.pdf
    • http://jivusibofonefud.mygamesonline.org/what_are_the_topics_comes_under_algebra.pdf
    • http://mibemuxagegija.mywebcommunity.org/carryon_my_wayward_son_piano.pdf
    • https://cdn.sqhk.co/kajipazuto/Aibjjig/uga_student_bucket_list.pdf
    • http://soldatskaya6.ru/why_is_the_pool_cleaner_not_working3u0w8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0ef2f354-78a3-4528-990c-72f69c86fc6a.filesusr.com/ugd/6a0da6_929899551b564bf197806b5c0b75c897.pdf?index=true
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_129f67f91a5f49b6a82b713e7453eea3.pdf?index=true
    • https://05282879-aed3-4f16-ac14-d534add4d4bd.filesusr.com/ugd/0f8b7c_4cb894a92f724b5e972959692e8e6fe9.pdf?index=true
    • http://jujobope.atwebpages.com/semuligenajalos.pdf
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_ee3421b7a718483f9527a986b10a4825.pdf?index=true
    • https://c480cc3d-c044-45b7-a7fa-747782367dcd.filesusr.com/ugd/a26f59_ce781dd893f740ba9c83abe5a592d862.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_off0000ef9c.bin
fe3d69caa77e3ac1783ce893230aa374c0c88de3c95ccbd471ed6b4ff48d0e5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9C 5280 bytes
font_01_sfnt_off000101ba.bin
9f7ffe90a4dee90d5cc3c3c4cc0a699a8bf3080155694e0854a5df0424092c6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101BA 11364 bytes

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