Malicious PDF — malware analysis report

Static analysis result for SHA-256 256f501eb5f62503…

MALICIOUS

PDF

80.2 KB Created: 2021-03-12 15:29:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 3f5c20382de7e06152d468888d3ea26e SHA-1: 1ffb0c25603b5d31db66c8b6fbffa58191a5d285 SHA-256: 256f501eb5f62503ff1da64826e2bc8498232be398da1d6b34d9f35edb897802
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'maypoin.ru', which is likely a malicious domain used to host or redirect to a second-stage payload. The document body, though heavily obfuscated, contains keywords related to 'Anosmia tratamiento pdf' and 'wkhtmltopdf', suggesting a lure to disguise the 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://maypoin.ru/award?keyword=anosmia+tratamiento+pdf PDF link annotation
    • https://cdn.sqhk.co/guxifunuris/gPiigHl/city_train_driver_simulator_2019_hack_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kazamepa/hDns63A/doruligalokojive.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b3f2228-6855-42e6-b22f-688950e02195/349434431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42b9ba94-83f6-42f1-89f0-f0cb788b749e/how_to_wear_navy_uniform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83a9d313-480c-4ab2-907c-69376516f23a/fibabovofaguxewulabin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a914994-9bb9-452c-ae89-a80e72a39022/iowa_codes_and_laws.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/172a741f-75ee-4014-9da6-1406c911a043/the_invisible_man_book_review_ppt.pdfIn PDF document text
    • http://zuxekesimulir.epizy.com/3200390645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41afdd07-dc2d-49fd-acf3-694a28a99ad2/asus_ac66u_firmware_recovery_tool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36ba5899-d2cc-459c-be9f-e475836bce07/rinuvizodevutodaxad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d35ad90-5d44-4535-b0d4-10acbe29fe70/sojubevivugonomuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/112f0f90-c2b8-4e46-86a6-c75eeffb92e5/sitiviwanavolenasob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbcb6a8a-2fe2-423d-ac8f-7ae562f69dd8/votuzatirejuxumimatewapuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4bc5f29-749c-4ac3-aaac-7072ab7057b0/how_do_u_become_a_secret_agent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/624a83e4-df06-46ec-b9c4-da332fde0403/staar_geometry_formula_chart.pdfIn PDF document text
    • http://xonefepuvimami.epizy.com/mine_bitcoin_android_phone.pdfIn PDF document text
    • http://zorijofoxafa.epizy.com/bedepupidodix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47f0e4f7-1c26-4665-b2d2-f499a7fed0bd/asp.net_core_mvc_route_config.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25861758-3c22-40a9-9b6a-d9def19fba10/jalirinimamuwabok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27586f94-b639-49f0-a701-eeb51aa3bff6/xerig.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF914 5144 bytes
SHA-256: 4e276504d0fc83598c34da9f3c48f7bf1a640978ebf820845cc7355b0e2bb162
font_01_sfnt_off00010a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7D 12116 bytes
SHA-256: a2623927a56b96f27c08abf65dd18cb15f3622b60e54a9956fe15b8f9cd6e3e6

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