Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3ff162b2751d928…

MALICIOUS

PDF

82.0 KB Created: 2021-09-12 16:24:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e413e9054061b1a5111bc2032e9d5f3f SHA-1: 0eb1c0c27b327250e693e31c16cc734a2a060932 SHA-256: e3ff162b2751d9286d2d2a82fa4a87a8c9a1c7dbf866bd1c7569d2ec1f28c495
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites and utilize disposable hosting, suggesting a link farm for SEO poisoning or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://careerroots.net/ckfinder/userfiles/files/pimadusuxitenurisija.pdf In PDF document text
    • https://cesiedizioni.com/userfiles/file/61676209320.pdfIn PDF document text
    • http://devitohomesorlando.com/userfiles/files/32446911128.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/nusijemunovavozu.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/kafavufawonugugukuruwu.pdfIn PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/letesavifezuvem.pdfIn PDF document text
    • http://archiw.gbpopatowiec.pl/img/upload/files/bategexoralimisubavo.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/80895420841.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16136ca5692ce5---17850528912.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a8697116f2---20084829105.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/2360244156.pdfIn PDF document text
    • http://araratmebel.ru/img/file/rudilafitosiji.pdfIn PDF document text
    • http://kxxbs.com/uploadfiles/file/a/wixutonuxidedib.pdfIn PDF document text
    • http://website-design-company.in/dev3/damodar/ckfinder/core/connector/php/userfiles/files/winidivixiteramut.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/lefakemug.pdfIn PDF document text
    • http://bjavc.com/filespath/files/20210903052034.pdfIn PDF document text
    • https://clarkfamilybuilders.com/home/clark/public_html/ckfinder/userfiles/files/59316652670.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/74277307655.pdfIn PDF document text
    • http://s13cf5ef.alojamientovirtual.com/ropalaboralbarata.com/userfiles/file/xetigixanowamobi.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/baepliv4emvkemqsh1gpfeg1a6/25202934173.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/tefotemipoj.pdfIn PDF document text
    • http://huynhgiabaohotel.com/uploads/FCK/file/51094406191.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9d2b38221---fujimapenutubolugubu.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/zakefolizevusovozubafuki.pdfIn PDF document text
    • http://mislenyiallatorvos.hu/userfiles/file/xuzozirimu.pdfIn PDF document text
    • http://levotst.com/uploads/files/sijobadilumelaru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=truck+driver+city+crush+hack+apkPDF 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_off0000db85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB85 17296 bytes
SHA-256: 2933f675310de7f5198e01abe96832d577dc3a112b9066f2058a80ad8f61af97
font_01_sfnt_off00010837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10837 10676 bytes
SHA-256: 0d891a20c3c3db937f2f6afe09dbe70e6e4380272abd1ed6af6df99c18d05d0a
font_02_sfnt_off000120ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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