Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf80563f65ff21de…

MALICIOUS

PDF

74.2 KB Created: 2021-04-14 23:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4ced9f2579faaa7a96994c07dd066fc4 SHA-1: 42ff8f2d0305ebbdfcd7725160ddaea8864e9451 SHA-256: bf80563f65ff21deefcd52ecb5e85fb073a9e85d843234fda3c1c4df09aa49ea
212 Risk Score

Malware Insights

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

The file is a PDF that exhibits characteristics of a malicious redirector and a link farm, with numerous embedded URLs. The presence of a malicious redirector link and the sheer volume of external links suggest an attempt to lure users to malicious sites or engage in SEO manipulation. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or malicious content delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8359

Heuristics 4

  • 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.
  • 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://crophysi.ru/strik?utm_term=the+tyranny+of+merit+what%2527s+become+of+the+common+good+book+review In PDF document text
    • https://vufaredagisab.weebly.com/uploads/1/3/4/5/134585575/misuvizofatajiv.pdfIn PDF document text
    • https://dadekojulaza.weebly.com/uploads/1/3/4/3/134320805/9391234.pdfIn PDF document text
    • http://zoomita.space/accountability_significadohqqdo.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://ziruxirunilexa.weebly.com/uploads/1/3/0/7/130775543/savime-didesegegipum-xudoxufivexo-riruxeze.pdfIn PDF document text
    • https://jazemajotejavux.weebly.com/uploads/1/3/2/6/132681398/5989600.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/wofolufimapana.pdfIn PDF document text
    • http://eslife.pro/madasuwogubaxey9t0g.pdfIn PDF document text
    • https://molukubiluvu.weebly.com/uploads/1/3/1/4/131453067/603558.pdfIn PDF document text
    • http://sabumow.mygamesonline.org/ab_negative_blood_type_diet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_a663454cc86b4995aff0bd34b403870d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/sony_kds-60a2000_lamp_light_flashing_red.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/33730801514.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/identifying_noun_phrases_worksheets_ks2.pdfIn PDF document text
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_bb169ad4594c4cebbf3ce5a5e6114ae0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4ca74f8-f5c1-4262-9420-1ca4ff21666b/bivokezaxuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f09a8ce-c8e2-4788-b952-7837fc08ad7b/lasogikulurudimamosuluge.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/honda_express_for_sale_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebefb3eb-a22a-4271-8285-8a61b891ea17/kagulonisix.pdfIn PDF document text
    • https://b3d988c2-7a7d-4c3c-9141-221b6550481e.filesusr.com/ugd/9dda13_0452f07054794ccf91cf1717ca1efa47.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/what_level_reading_is_junie_b_jones_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a4c772a-68eb-4eff-bcc0-c2b86b063cb4/35458691304.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C9 5844 bytes
SHA-256: 0ad910e8eec65f11e79e17d8fa0139d069180179cbde8cd52a49712d8c393783

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