Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e865723f002e073…

MALICIOUS

PDF

82.9 KB Created: 2021-09-12 04:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 14bb68d5d13370f9ad95e6cadf59983a SHA-1: d7713fd8385e3e326b601f68c88da5ae42e62f98 SHA-256: 4e865723f002e0738cb18b9daf83e6905c71fd0697d120823ebd2c0f849173ae
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics suggest it functions as a link farm, directing users to potentially malicious external PDFs, with one specific URL identified as a likely download source. Although no scripts were directly extracted, the PDF structure and embedded URIs point towards a phishing or scam attempt, likely related to the '8 ball pool hack' mentioned in a redirected URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://le-lemniscus-incandescent.fr/ckeditor/upload/files/2285012274.pdf In PDF document text
    • http://candleelectricals.com/uploaded_files/userfiles/files/10094880304.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ccbe594004---kagumuretazumekaboje.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/xidosisinogepol.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/71676653367.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/xomafisojuketuzene.pdfIn PDF document text
    • https://mekongtransport.com/upload/userfiles/files/vazibirobixegefer.pdfIn PDF document text
    • http://119pump.net/d/files/kubufukulomenoxubawidul.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1631051764.pdfIn PDF document text
    • http://gamboeng.com/assets/ckfinder/userfiles/files/5824584376.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/paxegorokemuj.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/64187410262.pdfIn PDF document text
    • http://steakpluspizza.us/userfiles/file/69572008683.pdfIn PDF document text
    • https://coonvalleycc.com/userfiles/file/62467776069.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/36220003331.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/13244795471.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/6344452590.pdfIn PDF document text
    • https://dolmalatrek.com/userfiles/file/22509188806.pdfIn PDF document text
    • http://a-xian-coat.com/uploads/files/202109030928324155.pdfIn PDF document text
    • https://mcq.bmtinhoc.vn/InteriorWeb/images/images_news/files/muvukakanegurilezi.pdfIn PDF document text
    • http://mrybalko.ru/files/xisamamatukaduzikogaji.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/66225478513.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/57428108853.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=8+ball+pool+hack+2020+unlimited+coins+and+cash+online+downloadPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8C 18584 bytes
SHA-256: 9256ad26fb37eddf381861bf4d96926572d55251de0f18bb14f88ab4f7e46b3b
font_01_sfnt_off00010a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AA 11452 bytes
SHA-256: 496133350755be9c0f700cf94c94cd208d3f05fa78a226c6b61c68227aadd4e9