Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee2267e623992c5e…

MALICIOUS

PDF

85.3 KB Created: 2021-09-04 20:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6b7eda4119948202c120a8bac614ad22 SHA-1: d09a1d682675cfc694b7fea7f0b4c7539101109b SHA-256: ee2267e623992c5e483cd8a438e2b6105f65fef2caff07636d0b09e55ea9d0dc
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The primary attack pattern involves luring users through a seemingly innocuous PDF to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://wwsm-us.com/files/file/33667539886.pdf In PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ed968c932e7---34860930230.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d59444df44---vezubokitewipuzirufupowet.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f5625c86a---sejefarif.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/84f90da5458b68faad3e3b3833a1fbad/82910079320.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/79c2f3d758caa8486913c259d847456b/lunimesotirezixa.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/76ccf970b7ba7065878179cf9653c39c/zitenefoludinamiliki.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9d1ae1f0b---33971808776.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e154aae7e---84125994088.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/fa1431e4ef5d20921e31dc8ba15f1721/wawarisedotaxo.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1610b45f12372a---sazawasaxevasip.pdfIn PDF document text
    • http://hodori247.com/uploads/files/dokikezuzazusefebanix.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/kapabumisalodogad.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881ebaa7138---20576575439.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/a140d4b0gslftlp45u21gote9m/15296438102.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/kipajowujadewevenaduge.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a8be34b6300---jiguwumetitab.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/bifugetetetudex.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/o9qnv6ds5ajnumhi0g8l415r83/rogapikelorusume.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/9163185a044b46608bf2e028e05ec2d3/ribewizipujuduriwulenog.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c7075aa9780---82638425765.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b89118b5f9c---4861128736.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/xadigokiguvefiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=skipping+rope+exercises+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_off0000e90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90D 17576 bytes
SHA-256: 44ef4281a5acc31f4196058216c96a7c68fc217f2ac1d430738390668f28c7ab
font_01_sfnt_off000116a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBC 10760 bytes
SHA-256: aacdc824a810aa081196964e839847fbb6f918afb8d117a677289c1848a1f47d

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