Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0d1b89773425ca…

MALICIOUS

PDF

79.0 KB Created: 2021-05-12 09:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4677009858d6fcc1ece41654f3d59579 SHA-1: 00bcf1ad1b434bf4fb898eccfb5718ab9102aab1 SHA-256: da0d1b89773425cac9d39fe8459ec281fda99806e61ee805685c0b650748ea3a
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links pointing to various external websites, many of which are hosted on disposable domains or redirectors. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded links suggest an attempt to direct users to malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/strik?utm_term=what+is+8+to+the+power+of+1%252F3 In PDF document text
    • http://leqqurint.online/lotusubamivukivufekuduwudktbk.pdfIn PDF document text
    • https://rogewakaz.weebly.com/uploads/1/3/2/8/132815912/9be6c.pdfIn PDF document text
    • https://semizafug.weebly.com/uploads/1/3/1/8/131871859/bda441.pdfIn PDF document text
    • https://nebavorod.weebly.com/uploads/1/3/1/4/131406600/4bf7c26ba8.pdfIn PDF document text
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/vimani.pdfIn PDF document text
    • https://jazelisis.weebly.com/uploads/1/3/4/8/134870131/zigexupek.pdfIn PDF document text
    • http://iciko.xyz/how_to_read_someones_body_language1w5np.pdfIn PDF document text
    • https://wawokosekipazas.weebly.com/uploads/1/3/1/4/131452886/lewowotogefugap-tojamolosawu-fajomo.pdfIn PDF document text
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/gibop_pejezezusun_kowaroxatazuki_dajuvoxive.pdfIn PDF document text
    • https://zajuzuvo.weebly.com/uploads/1/3/4/4/134474050/8ef9ebf0ed.pdfIn PDF document text
    • http://siondez.ru/gigiwud1nqtm.pdfIn PDF document text
    • https://govexofube.weebly.com/uploads/1/3/1/8/131872198/roloxadoranoze-gegipazopenin-topasawelumexa-jogosar.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/como_crear_abundancia_deepak_chopra_mp3h9zug.pdfIn PDF document text
    • https://parimuxuroz.weebly.com/uploads/1/3/2/6/132682994/linisanub_gaxemow.pdfIn PDF document text
    • http://snegny.com/oracle_12c_sql_chapter_6_hands_on_assignments_answersl1s75.pdfIn PDF document text
    • https://jasuxazej.weebly.com/uploads/1/3/4/8/134875243/zivekamoli.pdfIn PDF document text
    • https://bunoworerut.weebly.com/uploads/1/3/1/4/131438217/0b2119af7c54c2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sowezide.epizy.com/creating_value_through_business_model_innovation.pdfIn PDF document text
    • http://fogalefudomuj.epizy.com/arrange_page_online.pdfIn PDF document text
    • http://binutovunisiriv.rf.gd/rudaxewawivalukefafojug.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/checklist_format_in_excel_2007.pdfIn PDF document text
    • http://mezajuwobit.rf.gd/zibugelijujusitofaketegos.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/47461044719.pdfIn PDF document text
    • http://wosipofu.rf.gd/acknowledgement_samples.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_off0000f807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF807 5508 bytes
SHA-256: 3a181f1f9e71da7e192ee0a049489fc3de736ccf2349a5da23e0478645e69ad6
font_01_sfnt_off00010ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE6 10440 bytes
SHA-256: e021200c257600f4f0024f3766818486379963560c33df18095fc46d5cdeb882