Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ecb13d853b0849…

MALICIOUS

PDF

86.8 KB Created: 2021-03-17 05:28:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f47472d7bc59434c61d9830b245fb8c SHA-1: 13e7c973414c31fb645b1ae08a88445da011338e SHA-256: f3ecb13d853b084980b600e5978a246a5c88429f05bc90d4a3c33339bcc8ceb5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF link farm' designed to generate traffic. The document body, though heavily obfuscated, appears to be a lure related to a specific book title, suggesting a phishing or malware distribution attempt. The presence of external URIs and the ML classifier's high confidence score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/award?keyword=le+livre+de+la+magie+sacr%25C3%25A9e+d+abramelin+le+mage+pdf
    • https://cdn.sqhk.co/turomixo/mjg5whc/fast_notepad_1._4._4_apk_download.pdf
    • https://cdn.sqhk.co/kululojilo/jjjdha4/warufikonelesub.pdf
    • https://wekupadafar.weebly.com/uploads/1/3/5/3/135315244/4ff8be029c41af1.pdf
    • https://cdn.sqhk.co/sofilita/hczhbjf/jivodopal.pdf
    • http://zijimesaxa.iblogger.org/71170572196.pdf
    • https://cdn.sqhk.co/xudadidi/hcw7Pic/recarga_amigo_telcel.pdf
    • https://cdn.sqhk.co/lorotukogof/gcnhaOM/duet_songs_karaoke_list.pdf
    • https://talipugetajizan.weebly.com/uploads/1/3/4/8/134862074/genadezarizawi-tekej-girefore-gawug.pdf
    • https://bafonalilazuxi.weebly.com/uploads/1/3/4/7/134731076/zowad.pdf
    • https://bubebozozuj.weebly.com/uploads/1/3/1/8/131871643/lilodewizakome-tolefejexosure.pdf
    • https://cdn.sqhk.co/fazologim/jhbyIUr/63010333265.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://dopapaxejoj.epizy.com/website_development_quotation_sample.pdf
    • https://s3.amazonaws.com/vidadaviwal/70175271583.pdf
    • https://s3.amazonaws.com/jobavo/93109502276.pdf
    • https://s3.amazonaws.com/tobaziw/comparing_two_digit_numbers_worksheet.pdf
    • https://s3.amazonaws.com/rotowan/videoder_premium_14._3_4_apk.pdf
    • https://s3.amazonaws.com/zagapaxa/84624148018.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee8b.bin
c3ccf4b36e407e5eb68c75362ec2b74f41fe4bf9b61e18ba401335e56f4c00a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8B 5356 bytes
font_01_sfnt_off00010054.bin
f48e1ae174627a5ba1c35554f6d121247e22c9ee71cb65b303dff18a0d050873		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10054 12284 bytes
font_02_sfnt_off00012747.bin
bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12747 16312 bytes
font_03_sfnt_off00013cd2.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD2 4324 bytes

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