Malicious PDF — malware analysis report

Static analysis result for SHA-256 db3ca2e9791a0c0b…

MALICIOUS

PDF

78.2 KB Created: 2021-04-06 15:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68bc706948b59c48546afd2e751b444b SHA-1: b00fbcd517462b4085677444035fcda7f64cf44c SHA-256: db3ca2e9791a0c0b0efd9cc3e17f39c002f13855a3aece853c23079331b10b1f
136 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. The document body, though heavily obfuscated, suggests a lure related to 'Microsoft toolkit' and includes a URL pointing to a potentially malicious domain. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' strongly suggests the document's intent is to trick the user into decrypting a malicious archive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://soxebez.ru/wix?keyword=microsoft+toolkit+2.5+2+como+usar
    • http://tokexal.medianewsonline.com/tujarojifak.pdf
    • http://xemakaze.mywebcommunity.org/speech_on_kashmir_in_urdu.pdf
    • http://ifeelgood.club/wutomapivalurilinupat4hf3.pdf
    • http://info-pages.ru/besazefavilabagoloradistdo6.pdf
    • http://nitesufi.sportsontheweb.net/purussaurus_brasiliensis.pdf
    • https://static.s123-cdn-static.com/uploads/4489609/normal_5ff7578716715.pdf
    • http://tomolijoponix.mypressonline.com/suwokotuzeg.pdf
    • http://aov.one/kerigodubosigupulorituma96eki.pdf
    • https://cdn-cms.f-static.net/uploads/4470830/normal_603d815336dd7.pdf
    • https://cdn-cms.f-static.net/uploads/4474720/normal_60253d15d8368.pdf
    • http://creditscoreusa.info/how_to_read_30_unit_insulin_syringe7ntc0.pdf
    • https://static.s123-cdn-static.com/uploads/4384831/normal_5ffe9b8f5e118.pdf
    • https://static.s123-cdn-static.com/uploads/4387052/normal_5fe5ed761de82.pdf
    • http://finomimetafix.sportsontheweb.net/skripsi_tentang_brand_awareness.pdf
    • http://defi-bet.world/does_sketchup_free_work_on_ipads2rop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/99c84845-85f1-480b-8c94-d08e5a001e04/mupodeniwovupoxatil.pdf
    • https://uploads.strikinglycdn.com/files/77b67557-fe1b-4777-9d30-82a2c269e58a/64978942777.pdf
    • https://uploads.strikinglycdn.com/files/f26aa7d3-644a-4618-b096-4c5b8d2bd59e/24682052196.pdf
    • https://uploads.strikinglycdn.com/files/ea8495d9-f696-4c16-9bda-ddb898a77d66/where_to_donate_toys_nyc.pdf
    • https://uploads.strikinglycdn.com/files/4fd2b0c6-a66b-4e71-a42f-44655ab94ff8/besived.pdf
    • https://uploads.strikinglycdn.com/files/ee3e481c-1d70-4fc1-92be-cb64bb4d2df8/galudalakarukewafoganaj.pdf
    • https://uploads.strikinglycdn.com/files/24a9a610-eed7-4fee-b0fc-074a3757c0c9/8579609297.pdf
    • http://lexekuduwowig.atwebpages.com/best_entrepreneur_books_download.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_off0000f19b.bin
cc268f124ead2c369354445301d3b962fb0f24c0f07052c1bb96665c57f4e13f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF19B 5384 bytes
font_01_sfnt_off000103e9.bin
1ff6cf327c78a6f3f6e464f304aafa16f80b03c78c23dc52a82198cebd46f89a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103E9 12744 bytes

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