Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3aca58a4f806626…

MALICIOUS

PDF

66.3 KB Created: 2021-01-03 04:49:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: bf1391e63a5402834ff198f8ed95d026 SHA-1: efcf42ee6c023dab300ba063eccfe67b7cb9ec66 SHA-256: b3aca58a4f806626489f958212383fdeab18fffef002b90e1f0b95c9c017a90d
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffnew.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to 'open source audio converter android', suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://traffnew.ru/aws?utm_term=open+source+audio+converter+android PDF link annotation
    • https://cdn.sqhk.co/kizofapekeku/CLPhffW/haircut_los_angeles_open.pdfIn PDF document text
    • https://cdn.sqhk.co/guledijuxi/bdgiund/rutogepat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387921/normal_5fac3a2642669.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/jelejawipabizozikoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6f50755-8fee-4fe4-beb2-e3ff5c86e1e4/stickman_archer_legends_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04f6536d-24ad-4d0c-acc8-2174085deedf/f.u._money_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8163dd0c-5dd2-422b-857b-43b1b3519b06/total_drama_leshawna_ball.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2739b945-13da-4be4-baaf-d0af8ff38710/19819533168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b1dd76d-faaf-47c8-8cc7-af3297b41b7b/78187728740.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBD6 5120 bytes
SHA-256: 289ed3699eb5587404937f0e28cb5befeff4fe16055e2af3c8002a4d996e9871
font_01_sfnt_off0000cd49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD49 6068 bytes
SHA-256: 58b4873d33ac9fffaf45ed1a2312b8eb5fadf3b067e77f8cfe9e87095f6a7717
font_02_sfnt_off0000dcf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF9 9072 bytes
SHA-256: ed77b918d3ebc95f93aea53a172d0df5e9cdc5fce2c971747b6bf2f491b714b1