Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcada86d9c82ccf2…

MALICIOUS

PDF

69.9 KB Created: 2021-05-14 16:37:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d7c3263262b0a0e09ef7a96d315f354e SHA-1: 469fbbc0c24974be1d4d7553937ab8b0c1c8b764 SHA-256: fcada86d9c82ccf24347f2b6a82511ce72b081571c6fdfe11f1bfefb88a1d5b6
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link farm attack. It contains numerous external links, with a notable heuristic firing for a 'PDF_SEO_LINK_FARM' indicating a large number of outbound links. The embedded URLs suggest an attempt to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://nipisod.ru/strik?utm_term=whirlpool+refrigerator+french+door+problems PDF link annotation
    • http://tegeboxurogon.iblogger.org/injustice_2_ios_gear_guide.pdfIn PDF document text
    • http://vojumugojiliwa.iblogger.org/application_letter_sample_for_scholarship.pdfIn PDF document text
    • https://cdn.sqhk.co/tuvasovosew/ge55Cgc/jedeluxurogizaketet.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/ejdjbgd/woburijodasari.pdfIn PDF document text
    • https://cdn.sqhk.co/voravaxa/hggi1hi/72570317338.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/UhemibO/doxusufit.pdfIn PDF document text
    • https://cdn.sqhk.co/novitovikor/jeNsUgg/18449366575.pdfIn PDF document text
    • http://barbanapoli.moscow/maths_negative_numbers_worksheetpx8tf.pdfIn PDF document text
    • http://small-italy.space/mamisolutisoroponurivzyc.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/go_math_grade_4_book_onlinehb6y8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/27945658078.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/dewigugesajonutonuwavug.pdfIn PDF document text
    • http://mozutebileba.rf.gd/buwabofube.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/28724595800.pdfIn PDF document text
    • https://1b6fbac1-9b66-4609-9151-81f5d4c316f7.filesusr.com/ugd/5e81b9_0b8f978ce95d4b3bb72f311f93348046.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sazomo/what_is_the_economy_of_japan.pdfIn PDF document text
    • http://ruxurosagogaru.epizy.com/consulting_services_website_templates_free.pdfIn PDF document text
    • https://abee6ad4-cf47-459a-954e-22b9b9bb30ad.filesusr.com/ugd/4bdc6d_a5175d63a8b04cb68de6d133e40f49bc.pdf?index=trueIn PDF document text
    • http://nitusul.rf.gd/sqlite_insert_android_datetime.pdfIn PDF document text
    • http://fezadup.rf.gd/kogixop.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/64898924145.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26F 5724 bytes
SHA-256: e34d2451657336651bfc9ce1bfcde08759b8c8219022c128cd5a683230340f9b
font_01_sfnt_off0000e5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C9 10536 bytes
SHA-256: f73a79cb413016822918eafc71b018b58c9e1dbbba42e3794ee0df91125f0812

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