Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f1886e7b2830d2…

MALICIOUS

PDF

81.3 KB Created: 2021-10-06 13:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 140029715744d21a52bb612ac5f67305 SHA-1: e22b342889fa59a76f4f66023d976a8f1584bfd2 SHA-256: e8f1886e7b2830d25314d921feb4ab7622dd9efc39ef2ace37498aedbe3148ac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to malicious content. The embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614319361249f---19278085814.pdf In PDF document text
    • https://aiaciran.org/cache/fck_files/file/molimiwepagarixujolitid.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/12661658471.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/99430115487.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/32713852617.pdfIn PDF document text
    • https://webhosting4.net/media/file/vitiduxafarojuruvonub.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/wawolosuri.pdfIn PDF document text
    • http://www.larucheapain.fr/ljk/file/pexumokirevawosu.pdfIn PDF document text
    • http://epilia.com/upload/FCKEditorfile/11117493917.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/wemigeforezatevinelowulu.pdfIn PDF document text
    • https://ksuskalology.com/images/file/xaruwurol.pdfIn PDF document text
    • https://tolgyesvolgy.hu/userfiles/file/6343890066.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/65579959748.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/24972810159.pdfIn PDF document text
    • http://imi.vc/upload/files/mowatovugen.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/13458327196.pdfIn PDF document text
    • http://khachsansapa.vn/webroot/img/files/lekifalasum.pdfIn PDF document text
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/gozobakomiluvufufajeji.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16159ef6a5c637---poninexikenejojoposisut.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/lobuvimebikijalurig.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/zazawesoxukoluba.pdfIn PDF document text
    • http://travellerisland.com/files/pilavu.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1614195d9e7ace---94024118056.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/23326516365.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/55173045951.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=riddle+quotes+with+answersPDF 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_off0000d968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD968 18440 bytes
SHA-256: 697ac6dffc159623ae25e0fb2757455d772750e1c5ca82509b4fb01238133d32
font_01_sfnt_off00010846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10846 10720 bytes
SHA-256: 2304c4fcf8a0fa9121c3290795416e660785e14737546bfda6955351d8f7f8fe
font_02_sfnt_off000120ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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