Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a81946e25819b8…

MALICIOUS

PDF

76.5 KB Created: 2021-03-09 18:26:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3717ba5349aa47c2b97ac685c7af17cf SHA-1: e645d7c1c97447397b4c5ee0811bf9adac19505c SHA-256: 72a81946e25819b87fbda4efac17be64613912955a471a85374783b4f9b84a24
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 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.
  • 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://xezojetit.ru/strik?utm_term=bible+is+the+inspired+word+of+god+verse PDF link annotation
    • https://cdn.sqhk.co/sixepatexup/eghnSef/zonojisofap.pdfIn PDF document text
    • http://sumazubaviloxog.22web.org/zuzosanelugagudemolovujon.pdfIn PDF document text
    • https://cdn.sqhk.co/paleguvebo/fiaZhjS/8600426185.pdfIn PDF document text
    • http://graatorama.space/zeworana092m8.pdfIn PDF document text
    • http://daimontimur.org/mesumodewipowex24g18.pdfIn PDF document text
    • http://instapodarok.site/54871041990fx9fk.pdfIn PDF document text
    • http://operationhomeplate.com/honeywell_visionpro_8000_wifi_manualyad40.pdfIn PDF document text
    • http://levantemosaic.com/which_is_the_best_whitening_cream_for_oily_skinwtk9e.pdfIn PDF document text
    • http://verefdliyvtorogo.xyz/rixunoxuwezafa2xsza.pdfIn PDF document text
    • http://dutuvowori.22web.org/soliwiwat.pdfIn PDF document text
    • http://copyright-help-center.com/92113054857hrwlu.pdfIn PDF document text
    • http://d-youtube.com/67116601500ey2ik.pdfIn PDF document text
    • http://help-ruleviolation.com/57374012437txw7q.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/ih7hbgj/nafuruzadefuposejexukin.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/bHidcfJ/pudusumitabokemukuso.pdfIn PDF document text
    • http://4escam-bot.online/fupimos5pgif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://39c1d623-eccb-4af0-a86a-15328a2d61f9.filesusr.com/ugd/3cb6cb_c1b247848bde4598b4ae2aa4fdf2afe9.pdf?index=trueIn PDF document text
    • http://likasiz.epizy.com/blood_type_diet_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49c86ba-946e-48b3-b07d-e185fce42135/piluxizilewifetogi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50646d39-8a86-4854-b3bb-048256308d59/the_challenger_sale_matthew_dixon.pdfIn PDF document text
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_70d51e18ba0845e2966fa3b1fb633aeb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e53c225-7aeb-4462-b609-e11120a82567/multiplication_puzzle_worksheets_grade_2.pdfIn PDF document text
    • http://komadolosa.rf.gd/suvifikokibabuvatapijuv.pdfIn PDF document text
    • https://7fca5364-97a1-4441-b76e-d2c429a59218.filesusr.com/ugd/735424_b6158cba27c54ae292fa243d6f76a140.pdf?index=trueIn PDF document text
    • http://tosaxope.rf.gd/12636063325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/310dbddf-250c-439c-9a47-40715af87924/zaxasiridalurumepogu.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_off0000ed6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6B 5432 bytes
SHA-256: 7c742fc29ba55fd757c8fc47540f5ab26f7c4dcf370cdae08b103ab401106953
font_01_sfnt_off0000fffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFA 10820 bytes
SHA-256: 445939201463d248d7d1648951eb1e96c695bdc23618830cb8f40dd5c3d8909c