Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0cade0da6e94600…

MALICIOUS

PDF

65.8 KB Created: 2020-12-24 21:35:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2370b0abb04c94939dc2cefeb3d011d7 SHA-1: d7c0c8c44a4e696cea73e7d5da3ec438baad1f56 SHA-256: f0cade0da6e9460013cdd2a8b89707bcd99076d2a31d78c075e31d8d838330e8
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to redirector infrastructure, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were extracted, the PDF structure itself is designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/aws?utm_term=flannel+split+king+sheet+sets
    • https://cdn.sqhk.co/jelivapizivo/whdhclM/dovunepamofibemibin.pdf
    • https://cdn.sqhk.co/linerutinew/Ejhb1GY/all_star_smash_mouth_drum_tab.pdf
    • https://cdn-cms.f-static.net/uploads/4378621/normal_5f90d74579916.pdf
    • https://cdn.sqhk.co/pitewomepe/ibhgS8h/pulling_usa_2.pdf
    • https://padukasafif.weebly.com/uploads/1/3/4/4/134404544/rojefisit.pdf
    • https://cdn.sqhk.co/kilatelazobe/hgcyqN5/pojexefejuf.pdf
    • https://cdn-cms.f-static.net/uploads/4473053/normal_5fdb300a96c57.pdf
    • https://cdn.sqhk.co/lutaxudepoje/x0ijheK/jixubajuxedixi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jebokizez/13508224939.pdf
    • https://s3.amazonaws.com/jaxesabi/pigajugagerafim.pdf
    • https://s3.amazonaws.com/jeromopelurab/full_action_movies_hollywood.pdf
    • https://s3.amazonaws.com/wiwuxot/6073218993.pdf
    • https://s3.amazonaws.com/xamibebulosaxug/vixajafup.pdf
    • https://s3.amazonaws.com/zupenafud/epson_stylus_c88_printer_manual.pdf
    • https://s3.amazonaws.com/fojaxexino/blacklist_application_for_android_phone.pdf
    • https://s3.amazonaws.com/jadere/82595386474.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_off0000c3cf.bin
ab99c748517cf95bd040aa3f12d34d07fd4e03a67b6d605b4ec0d1ae243e0ffc
pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CF 5004 bytes
font_01_sfnt_off0000d4db.bin
f2658ea9f619adfd4be7f10d3772ca4677889d3a9d38835113051a6ef680bc3c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DB 10888 bytes