Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e7057c269a3644…

MALICIOUS

PDF

81.0 KB Created: 2021-03-21 03:59:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 159486a20fccff01d5b359ddfbebcdfa SHA-1: e586c66e5f9d3987f2e3f63abe02c1ac2d086ebc SHA-256: b1e7057c269a3644500e4152e406fc3a91005425382dc925fccd6571739d67ce
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'Virology mcq pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/award?keyword=virology+mcq+pdf
    • http://rovanenafet.getenjoyment.net/wuxulosalug.pdf
    • http://xabotijal.iblogger.org/wafuka.pdf
    • https://static.s123-cdn-static.com/uploads/4383445/normal_5ff9c03c68bb6.pdf
    • https://begopafisofebe.weebly.com/uploads/1/3/3/9/133997970/fec030d8ae7e9b.pdf
    • https://vesanalu.weebly.com/uploads/1/3/1/4/131482823/jafax.pdf
    • https://faxusonugavipil.weebly.com/uploads/1/3/4/7/134741565/db049c0f441.pdf
    • https://cdn-cms.f-static.net/uploads/4371524/normal_600c10c591af0.pdf
    • https://static.s123-cdn-static.com/uploads/4459188/normal_5ff2081f71f66.pdf
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/nugapeluti.pdf
    • http://velakisolafagi.22web.org/rerop.pdf
    • https://static.s123-cdn-static.com/uploads/4485172/normal_60092b824e97f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/ffe3b5c8-fe4f-4dc7-a9a7-b1ea6e87141c/zugubonizemelowud.pdf
    • https://uploads.strikinglycdn.com/files/b708854c-62df-4747-910a-4fed6a8f3e73/91977901962.pdf
    • https://uploads.strikinglycdn.com/files/4be31bfd-7238-4ec7-95e8-4fc0718c7a88/43923986557.pdf
    • https://uploads.strikinglycdn.com/files/3d4647b1-a3c5-40d2-9005-4fb850518655/a_dolls_house_henrik_ibsen_full_movie.pdf
    • http://metotosebofetu.epizy.com/build_wood_shooting_bench.pdf
    • https://49f3a523-2ddb-4f17-a073-729d67a362fa.filesusr.com/ugd/18c683_cda30c39e7fe4b77bc41d998a4a5953a.pdf?index=true
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_25124515240d4967a0f9c6fb801964ee.pdf?index=true
    • https://1df32be7-5e6a-491e-80e4-5c558052ef26.filesusr.com/ugd/e02e08_502c97fa593642bda924e6c0cce04b38.pdf?index=true
    • http://sajatuvireguta.atwebpages.com/zoputijedixin.pdf
    • http://kivekedifewu.rf.gd/betterwmf_v6._00.pdf
    • https://66c7139a-03c0-45fe-98d3-e817d1e01442.filesusr.com/ugd/de2db5_c64d1fa840464b63ab61d3fcd1c6fb96.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f26d.bin
0637c798e36448366300a7f0ea5b67bbdb9e413524a4fe4c36e6bbf36e16fee5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF26D 4764 bytes
font_01_sfnt_off00010296.bin
84a2cfa71167360c0616cbe811ebd50fa7292412949c5cdf4205fbf4d548d85b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10296 11664 bytes
font_02_sfnt_off00012895.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12895 4324 bytes

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