Malicious PDF — malware analysis report

Static analysis result for SHA-256 432ebb79cbb6bc1a…

MALICIOUS

PDF

97.7 KB Created: 2021-08-12 19:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fdf0cc489dfbd97f55dfb7b8e89fd8c4 SHA-1: 3a945775dc4043e37a8c128f317e0ba3b1c4600f SHA-256: 432ebb79cbb6bc1a3c74c943196a55f114c98426f30d71b131734b5f49c7ae26
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to compromised or disposable hosting domains. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware delivery through these links. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ukkies.be/userfiles/file/bodixonedanosip.pdf In PDF document text
    • https://stopserv.ru/files/file/85637724023.pdfIn PDF document text
    • https://giasusinhvien.net/upload/files/xozapafizipebiv.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/svddc2nstcdd63vamq1lkcnh1h/votaze.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a2a94beae837c67f9480be9a11da557a/jekemijujikir.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/ririwajak.pdfIn PDF document text
    • https://avflash.nl/upload/files/lifitupagubib.pdfIn PDF document text
    • https://autopratichesas.it/file/18330212235.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6fa99fb2e---vorapula.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb5a6cc62c---2974949442.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/a65dktnsnqd4qkp50ulin5ojcv/16999977138.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876cfb860bf---kutetupuregelikawuwo.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d401113fcd---30742410316.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffdac412a2---folixolovonoxi.pdfIn PDF document text
    • https://mangmalungtea.com/userfiles/file/15882840422.pdfIn PDF document text
    • http://olech-rzeszow.pl/userfiles/file/zunuwororenuzarowu.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a621934da0---vivas.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/14761574646.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/391db0372b1f67422eb4f50f3bbca5e1/15410744627.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/83384682903.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/jugubemofatosipawojerosi.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099195631abf---negiwav.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/kazewon.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210617064619.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=9.s%C4%B1n%C4%B1f+almanca+%C3%A7al%C4%B1%C5%9Fma+kitab%C4%B1+cevaplar%C4%B1+ata+yay%C4%B1nc%C4%B1l%C4%B1k+2018PDF link annotation
    • https://mediaget.com/userfiles/files/57957557891.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://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_off0001101c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001282e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282E 19928 bytes
SHA-256: 15e1fef5efef271ec5a472e193807bae114014cc0f4da43c79bafb9f7e778b25
font_02_sfnt_off00015936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15936 12056 bytes
SHA-256: ecfce3786bcf2b87d465d46d2287477d4090b60261fbf4aa66a5c75e7ef1577c

Open this report in the interactive analyzer, or submit your own file for analysis.