Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a4ab2f1fa0bea46…

MALICIOUS

PDF

89.2 KB Created: 2021-01-06 20:21:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: be081755e6cc5d6074283c33ae5ccd10 SHA-1: 25256ddcde3bfc2b2b3d2dbc76d334ce25baae8e SHA-256: 7a4ab2f1fa0bea46f3cb42c64c2c3476b17ef4ae3d196385e3891af765346398
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with a critical heuristic identifying a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs suggest the document is designed to redirect users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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=cabinet+ministers+of+india+in+tamil+pdf In PDF document text
    • https://sakotitalivuvu.weebly.com/uploads/1/3/4/8/134887700/32993.pdfIn PDF document text
    • https://cdn.sqhk.co/xogovofofi/a91Zihd/teteroxemaninaganataj.pdfIn PDF document text
    • https://vumimexuderuwaz.weebly.com/uploads/1/3/1/8/131871863/pevatozivusa.pdfIn PDF document text
    • https://cdn.sqhk.co/japokaxe/cc0Fii9/lixubusujufex.pdfIn PDF document text
    • https://ziloboze.weebly.com/uploads/1/3/2/6/132683463/756169.pdfIn PDF document text
    • https://dupasaku.weebly.com/uploads/1/3/4/2/134235895/7bf5d5d89265.pdfIn PDF document text
    • https://favasebuwakule.weebly.com/uploads/1/3/4/3/134328846/6133601.pdfIn PDF document text
    • https://memuvarava.weebly.com/uploads/1/3/1/3/131384606/datokude.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/551031.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/sinadi/idiopathic_thrombocytopenic_purpura_pathophysiology.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/zomizusigematutora.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/jobe_song_amapiano.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/merriam_webster_dictionary_for_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/old_path_white_clouds_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/addison_wesley_science_10.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/ff14_chocobo_breeding_guide.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3C 5232 bytes
SHA-256: 9de9c24b6b31925062fd84d8593b6668ea13eed87ae90d36b0ebc3659586e5a0
font_01_sfnt_off000120e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E5 3832 bytes
SHA-256: ba9f679288be961da1d98a1db0124c0d6d9e55301b2ccad874e2d82a54c58ead
font_02_sfnt_off00012ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF9 12044 bytes
SHA-256: c5592ce11c6546cba0f23dca46edbcae7302ac33da5dc385c63cb2cc8f042bdd

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