Malicious PDF — malware analysis report

Static analysis result for SHA-256 a194090f1618eddb…

MALICIOUS

PDF

168.2 KB Created: 2021-03-09 13:26:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6359e0b3dacda5ff3c72a957633fef8d SHA-1: e6fdd44e0546d75543918266b4c95a03f364c699 SHA-256: a194090f1618eddb1cb4c7bc095f42f1001664c711495be1083c8605be030671
136 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it contains an advance-fee scam lure, presenting language related to lotteries or prizes and requiring interaction with external URLs. One such URL, https://seumenha.ru/award?keyword=english+textbook+year+5+pdf, is directly associated with the scam lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://seumenha.ru/award?keyword=english+textbook+year+5+pdf
    • http://vukufitu.mywebcommunity.org/how_can_i_get_a_form_ssa-1099.pdf
    • https://cdn-cms.f-static.net/uploads/4403541/normal_603ee4fbe741d.pdf
    • https://static.s123-cdn-static.com/uploads/4495400/normal_5fc833c3e59e9.pdf
    • http://warixedivukinat.mygamesonline.org/79492247900.pdf
    • https://cdn-cms.f-static.net/uploads/4503309/normal_60150d98a9026.pdf
    • http://dalosizofovabes.medianewsonline.com/are_there_any_ps_vita_emulators.pdf
    • https://static.s123-cdn-static.com/uploads/4467564/normal_5fe55242ae8c8.pdf
    • http://daludaja.getenjoyment.net/gofumiju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/e1b053e4-9675-4632-9fa5-7fd95e6dd9ac/how_to_say_mami_in_spanish.pdf
    • https://uploads.strikinglycdn.com/files/c7921bc6-2faf-4769-b266-b951b981b7f0/is_the_2016_lexus_rx_350_reliable.pdf
    • https://uploads.strikinglycdn.com/files/171d5ca2-a83f-4c3b-99e1-5c13d31a7169/abc_worksheets_cbt_examples.pdf
    • https://uploads.strikinglycdn.com/files/82158e3e-5616-4ca6-aebb-e71f63cdba76/61610917352.pdf
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_4fd77a8666d446c2866943af5a626989.pdf?index=true
    • https://uploads.strikinglycdn.com/files/39b82638-731a-44d1-8400-494df6e99271/4245251630.pdf
    • https://uploads.strikinglycdn.com/files/e4c9bd6e-8f99-43a4-aec0-16a789508eb1/77515291459.pdf
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_13d40e013c2041bfae416fd118fc4f80.pdf?index=true
    • http://xowobovu.myartsonline.com/41251807847.pdf
    • https://uploads.strikinglycdn.com/files/c1a174ec-418f-4cd8-85fa-a6217064c8e3/club_car_gas_golf_cart_battery_not_charging.pdf
    • https://uploads.strikinglycdn.com/files/7c7d7bab-05b7-4447-9fb9-9ce8596372dd/intermediate_microeconomics_textbook.pdf
    • https://uploads.strikinglycdn.com/files/81e9babe-4fba-4fae-91db-be572bcb3244/86155039182.pdf
    • https://uploads.strikinglycdn.com/files/9ffb8f2a-581b-4a69-8e67-27625c42ff96/greek_play_scripts_for_middle_school.pdf
    • https://uploads.strikinglycdn.com/files/f3d64a2c-f452-4c13-a047-c0793edd3a4d/sowewurone.pdf
    • https://uploads.strikinglycdn.com/files/90ed41e3-c7e1-4851-a5fd-a92cb3d848d2/41067333561.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023bd4.bin
5069f4fba7332e53451f48ae0d16a2f57cd9641a7db933a95b64df33c425b421		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23BD4 5548 bytes
font_01_sfnt_off00024eab.bin
b39ebb8a5106ba98e1f5d8346590a5c2241d84f12693ed91a3d11f373ca5e8dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24EAB 17136 bytes
font_02_sfnt_off00028431.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28431 4324 bytes

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