Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef06be12fad5a3f…

MALICIOUS

PDF

79.0 KB Created: 2021-06-07 13:26:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fee7609b250d8c74b82f069e4db6a97 SHA-1: df7692c1b954a549c0662ec973076e1700807bf7 SHA-256: 7ef06be12fad5a3f06c2e36bd774167d2c32ebb33f1f574f962cfbf2a9a446af
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, with a high risk score. It contains an embedded URL pointing to 'philabc.ru', which is likely the primary lure. The PDF structure and metadata suggest it was generated by wkhtmltopdf, a common tool for creating PDFs from web content, which could be used to disguise malicious links or content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://philabc.ru/pbw?utm_term=body+by+rings+pdf
    • https://cdn-cms.f-static.net/uploads/4386361/normal_606e828002fb2.pdf
    • https://static.s123-cdn-static.com/uploads/4366022/normal_600445b938d19.pdf
    • https://cdn-cms.f-static.net/uploads/4393506/normal_603544c5880f1.pdf
    • https://static.s123-cdn-static.com/uploads/4418362/normal_5febd2efb07d2.pdf
    • https://static.s123-cdn-static-d.com/uploads/4443576/normal_60b004911a082.pdf
    • https://cdn-cms.f-static.net/uploads/4420432/normal_601f34269ca1b.pdf
    • https://cdn-cms.f-static.net/uploads/4461497/normal_6060ed27c8638.pdf
    • https://static.s123-cdn-static.com/uploads/4473656/normal_6000a2d918de1.pdf
    • https://cdn-cms.f-static.net/uploads/4462775/normal_602b4f30d13dc.pdf
    • https://cdn-cms.f-static.net/uploads/4420476/normal_6056f96d9de95.pdf
    • https://static.s123-cdn-static.com/uploads/4450247/normal_5ffadc5dd0846.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/94772a3c-fd04-4c79-aa3a-f1ab7c82e304/58006660887.pdf
    • https://uploads.strikinglycdn.com/files/72816d3e-ff96-4295-9eff-b963304c3cbe/61286881952.pdf
    • https://uploads.strikinglycdn.com/files/564c1de3-ae94-481c-8e23-8f9457ab60ca/regarder_film_le_petit_nicolas_en_streaming_vf.pdf
    • https://uploads.strikinglycdn.com/files/a7d25814-9309-44ff-893e-fb1e66b976ac/dikoxipiluzuburudisav.pdf
    • https://uploads.strikinglycdn.com/files/ec413aa0-c876-4589-8362-31de4a13bbba/tokugevagizuwe.pdf
    • https://uploads.strikinglycdn.com/files/10e99261-6f61-4c48-8f81-c0a2f76150e8/44769853273.pdf
    • https://uploads.strikinglycdn.com/files/664d347c-a4f5-4776-aa6d-4f0248302be6/achyutam_keshavam_krishna_damodaram_free_download_mp3.pdf
    • https://uploads.strikinglycdn.com/files/828e571e-6693-4d8b-80a3-86a14664b7c3/how_to_get_prestige_master_in_black_ops_3_glitch.pdf
    • https://uploads.strikinglycdn.com/files/69853961-ebb1-44e1-a52c-7587ee2e0826/convertir_pgina_html_a_online.pdf
    • https://uploads.strikinglycdn.com/files/0b320564-b44d-441a-a25d-c54abb1421d1/oracle_sql_substring_concatenation.pdf
    • https://uploads.strikinglycdn.com/files/a01c44dc-13d6-4aa5-b8a5-700d560c7da6/transformations_of_functions_quiz_1.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_off0000f5f6.bin
984d3251820744ca8f7d21990b5087dfb0f12a5a5767c24fe9e8c277c1f718de
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F6 5260 bytes
font_01_sfnt_off000107f2.bin
62945ae72e47f878f70a9647b5e9fcec64e2ecb4dc740a20f4daaa98965479d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x107F2 11104 bytes