Malicious PDF — malware analysis report

Static analysis result for SHA-256 53404fb057177909…

MALICIOUS

PDF

69.0 KB Created: 2021-03-18 13:44:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9df13029281e0abca846bd2abf44cb1e SHA-1: b25092df89198fbf10917f3288418c00b26508af SHA-256: 53404fb057177909097d92a067c7fa6442564f77695870bca3f0cb11e2ae4c55
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a large number of external PDF links, suggesting a malicious intent to redirect users. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document, likely intended to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-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://resalured.ru/wix?keyword=lake+michigan+rock+picker%2527s+guide
    • https://xiligori.weebly.com/uploads/1/3/1/4/131411896/zemawunopabapuki.pdf
    • https://wetexojozow.weebly.com/uploads/1/3/0/7/130740218/lerakezubezazaviv.pdf
    • https://jimekijan.weebly.com/uploads/1/3/2/8/132815057/kuwitusap.pdf
    • http://sudejiw.22web.org/chapati_pandu_song.pdf
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/revuforadosi.pdf
    • https://cdn.sqhk.co/xasakeza/izJgf3K/outlook_express_freenet_einrichten_pop3.pdf
    • https://cdn.sqhk.co/fuvebopeweb/BhgrIKi/crypto_wallet_app_android.pdf
    • https://cdn.sqhk.co/revujinarewu/lNGigaQ/raiden_move_list_mk11_ps4.pdf
    • http://zatorigixoluji.iblogger.org/charitable_contributions_request_form.pdf
    • https://vekazapez.weebly.com/uploads/1/3/4/6/134601327/4380837.pdf
    • https://taketelufi.weebly.com/uploads/1/3/4/7/134745639/701bd61a67.pdf
    • https://gozizakodo.weebly.com/uploads/1/3/2/3/132303179/kolobojavukasar-buxivitirowifa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://niburevukezuxa.epizy.com/16392638612.pdf
    • http://webubekesivamuf.epizy.com/85489839660.pdf
    • http://pagiwufuvefukuf.epizy.com/say_something_violin_sheet_music_free.pdf
    • http://paguvano.epizy.com/suwajujelatow.pdf
    • http://zojofat.epizy.com/kaziwolaxepanudu.pdf
    • http://zesositug.epizy.com/ar_rahman_music_instrumental_free.pdf
    • http://lizebij.epizy.com/head_first_javascript_latest_edition_free_download.pdf
    • http://woxutonugosafer.epizy.com/wifefoturabov.pdf
    • http://vonimamodiji.rf.gd/dopepobidavola.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_off0000cf45.bin
4470107af080b555a05973d549f6dfeef6389ba9463cbbceed25dfee2438f991		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF45 5492 bytes
font_01_sfnt_off0000e1d5.bin
7e317fcf55109483fa5efacc31ee75e609f5543d1b98d3988ab5ee51ac8d8a9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D5 10896 bytes

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