Malicious PDF — malware analysis report

Static analysis result for SHA-256 117e69072b075778…

MALICIOUS

PDF

148.5 KB Created: 2021-09-03 00:04:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c0cdbbfe9151e74e6aac51450b3e197d SHA-1: a62b5d7e8dc7bf0d4df9c2c0d5ef1afd0e6cb80f SHA-256: 117e69072b0757782bd8a7511316497d291138fe6793745111a0dda1f42e3d45
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/310541ceceeb014eacbc9f668d838ee6/66383958357.pdf In PDF document text
    • http://lnshiyue.com/userfiles/file/20210524015535_82998651.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/renulomub.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/ed4irn5lprum2n2jc1f7apt44t/sudofibasuze.pdfIn PDF document text
    • http://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/11746756693.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a135b7ea9f0---kuzorunakofetirenuwuwefa.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/jodozomilevus.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/9166522401.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/fotarovukomid.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/481fa563f931059679d358087a2d6e92/karega.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/013297b188b9123cb9c7288db3b433c2/juxagewesonun.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/8596ece52fc0fcb61c48c1807d3698ed/pugixokiku.pdfIn PDF document text
    • https://ambulatorioveterinariosismondi.eu/file/49180489232.pdfIn PDF document text
    • http://cnkls.com/userfiles/file/1628503751.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/2bd64788cf504452acb5cc00dd324454/migowese.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/29893382375.pdfIn PDF document text
    • https://sankohomestay.com/userfiles/files/96774946907.pdfIn PDF document text
    • http://www.sealjet.mn/pictures/files/44137131107.pdfIn PDF document text
    • http://cassotech.nl/site/data/ws/files/22063920760.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/71c7eb8ae3ba90803fd51b531b6856c8/fexukerinabofowaru.pdfIn PDF document text
    • http://contextuae.com/resimler/files/4214293662.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/14d813b0638e0c41edee6f1fd8101d86/feputarisesaz.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name/files/bamubovutebena.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=hernando+de+soto+polar+pdfPDF 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_off0001d9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D9D5 10392 bytes
SHA-256: 1ea3142dc72f588b8a045d7a74c2c176080a507287df3fe0db628b879d0739c2
font_01_sfnt_off0001f167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F167 22556 bytes
SHA-256: d2ea2849052618c8660558aef713d306b23789276e6d5eb6367af72427b90315
font_02_sfnt_off00022c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22C45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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