Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c9c0b77d6b8f078…

MALICIOUS

PDF

80.4 KB Created: 2021-03-13 23:28:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d96db9a8bc23dc509d293e5af18822ef SHA-1: b897457ef84f26aaa18b01df5d031a6ed9fb8f14 SHA-256: 3c9c0b77d6b8f0786f1b5a83685c1f034d32a7b15b4f9833efe670ea80d79832
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://golowaki.ru/award?keyword=career+paths+tourism+sb.+pdf
    • http://taxuluponizel.iblogger.org/black_law_dictionary_definition_of_black.pdf
    • http://itawegan.fun/84619370655zbsen.pdf
    • http://wiinorama.fun/641055526296qnzc.pdf
    • http://skidki-day.site/cobra_29_nw_ltd_classic_cb_radiodnrvo.pdf
    • http://walletelectrum.buzz/amway_global_entrepreneurship_report_2016wsr9z.pdf
    • http://antileqphh.site/how_to_rig_a_fishing_pole_for_troutaoycq.pdf
    • https://kunuxuzuvedenax.weebly.com/uploads/1/3/6/0/136051690/maxoveje-banekikofata-kugivax.pdf
    • http://bakofutemuxasog.iblogger.org/can_i_download_adobe_acrobat_pro_for_free.pdf
    • https://duketexu.weebly.com/uploads/1/3/4/7/134725944/7a7fa5300805a3.pdf
    • http://umniashka.ru/jesowukapukowugif6qyb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_cbc5c4a33b0c469283142b3bb86564e8.pdf?index=true
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_48c7826ac548474196a3dd3a69ec83f1.pdf?index=true
    • http://wagopof.epizy.com/tonasukopazobidoza.pdf
    • https://02687da8-bf2b-436b-a8ca-82c6e04513a5.filesusr.com/ugd/e48f8a_1ee829bd015d4aaaabbbd30eab183a5d.pdf?index=true
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_cf42215ccbf840298b575c81ff745d06.pdf?index=true
    • https://9e7b01ce-91ce-414a-93c5-ade8df4b7359.filesusr.com/ugd/cfbfd2_7b3556a349fa4d528fa0945925982811.pdf?index=true
    • https://d848e4b6-662b-4424-a759-963270729452.filesusr.com/ugd/30e015_dd3929e3642549dfbe6ae63d1dcb9f4d.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef52.bin
ed2b78586a08c3b1b95b25df153083de5291dfbf8caa8da578288344c46f7c3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF52 5324 bytes
font_01_sfnt_off0001013d.bin
68023433ccf6d6113b7992179865b211cb2f85374058e68725b23841f39258bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1013D 19044 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.