Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b85e8b9baed5397…

MALICIOUS

PDF

143.1 KB Created: 2021-09-02 21:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: bbbb6857c6390cd1cc7a04457ac7c9bf SHA-1: 04fc8b59cf9dfccc368653f59903f80a69009bc9 SHA-256: 8b85e8b9baed5397df2478df8e4ba28b5e9a98fbce5a3bd4c170f62d2f0cb062
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download' button lure further supports a phishing or malware distribution attempt. While no scripts were extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=homelite+hl4400+watt+8hp+generator+manual PDF link annotation
    • http://yksskj.com/ckfinder/userfiles/files/71758241641.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1c3ab5e2f---zewaligatos.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3b9fe7c29499d739f51b1b84cd0b051c/4620063711.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/4535855539.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/fibava.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607232f4f410d---17486485973.pdfIn PDF document text
    • https://digireg.lu/upload/rulawexazudobepoxebe.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/9a3fp6bi6srgbv90hsdgo1akd2/remuzojoxogi.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/44417540740.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e6307f378---gotedokogosubuxukinanima.pdfIn PDF document text
    • http://ipceurope.com/assets/file/50909704051.pdfIn PDF document text
    • https://medpressa.ru/files/file/nepuguwedin.pdfIn PDF document text
    • http://isystemlab.com/admin/ckfinder/userfiles/files/69313651113.pdfIn PDF document text
    • https://avvocatoboretti.it/file/tiwufowadujobag.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/zazireji.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/f6a9e282c4591a3a96aa78290e89fcc8/21013741132.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/80pv4sc3gr1kpsotbn9b3vb62j/26716692172.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e93370768---lepegeti.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/d73ka8kdv4skchpcd152l4q6f0/bowesefozafiwuxapuwu.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/fosapuzevigifa.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/d0065879cfa306e8028263433056e398/24858593073.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4b35a1ea6---34893831931.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d28148202---52440694010.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C792 19904 bytes
SHA-256: 3f8ccefd28ffb8ccf00044653abf4c6c2693c649e9a3d7c0f7a966e7554b07b2
font_01_sfnt_off0001fc47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FC47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002145e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2145E 11116 bytes
SHA-256: 7d342b9d7744a4e7576cc75f2d4924611961ca4004b202562958da6633878b04

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