Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9fce37581eed51…

MALICIOUS

PDF

40.2 KB Created: 2020-10-12 00:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1725f762c02b1855cbcb3a0e52f9481 SHA-1: 199ca40b4461f04b634cba7b2aa2d99a753b8266 SHA-256: be9fce37581eed51c60120b24e2a83af5aab4313744609b0fc114d1f980656b0
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, disguised with text related to downloading a song. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be directing the user to a malicious URL that likely serves further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/strik?keyword=lal+dupatta+ud+gaya+mp3+song+free+do
    • http://files.lucies-designs.com/uploads/1/3/0/7/130739142/gemelejil-tipukefefejog-jobofojuludigol.pdf
    • http://wazon.theandywallace.com/uploads/1/3/0/7/130739904/1597739.pdf
    • http://files.ahsfloralshop.com/uploads/1/3/1/4/131453484/sowigelabosizi.pdf
    • http://buwek.mariedyerstudios.com/uploads/1/3/1/4/131483036/biretimajo_rogemi.pdf
    • http://files.chschorus.com/uploads/1/3/0/8/130814475/8164632.pdf
    • http://files.mammologix.us/uploads/1/3/0/7/130775205/4868771.pdf
    • http://fiwataj.keystone-equestrian.com/uploads/1/3/1/4/131455543/525017.pdf
    • https://site-1038525.mozfiles.com/files/1038525/zipotutuvitijojefuteb.pdf
    • https://site-1042922.mozfiles.com/files/1042922/latiguguloj.pdf
    • https://site-1039556.mozfiles.com/files/1039556/7042052999.pdf
    • https://site-1042738.mozfiles.com/files/1042738/sagimifapodeniwozesedoxif.pdf
    • https://uploads.strikinglycdn.com/files/4f5ce8fd-85da-4a95-b785-88d8a3d4be6f/24180876031.pdf
    • https://uploads.strikinglycdn.com/files/160f7501-c896-4ce1-b2f3-a637c1cfc32f/70743485046.pdf
    • https://uploads.strikinglycdn.com/files/102d769d-2970-4278-8ca0-ed9fdaf63bde/59184164809.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005562.bin
d051a08cbabc7f15b7fd2a4a6f4d2f6413dea8a343de3af2f6ae1a774840a9a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5562 5568 bytes
font_01_sfnt_off00006845.bin
51e24e431dcfdc0bfa5687efe11bf4ffc347065b67f9f0690ec81e2728a2d076		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6845 13820 bytes

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