Malicious PDF — malware analysis report

Static analysis result for SHA-256 94113621c3b35b59…

MALICIOUS

PDF

88.0 KB Created: 2021-10-17 14:50:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 8572aec7cab1a33cbc0627bca65d283c SHA-1: ce58918fcb79a6cbc66978ed370f2895b33ee1f6 SHA-256: 94113621c3b35b59b4cc9725f84173810547dfda9034dac005587657dc508933
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://crewmak.ru/uplcv?utm_term=ahab+and+naboth+story PDF link annotation
    • http://anhuifan.com/upload_fck/file/2021-9-2/20210902102452430120.pdfIn PDF document text
    • http://annabarons.com/files/files/felamapuzilidixuv.pdfIn PDF document text
    • http://daiquangsico.com/img_duhoc/files/gurilizitadalo.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/vuxowa.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/goresi.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/23149239162.pdfIn PDF document text
    • https://piti.leaddeehub.com/userfiles/files/majevapigexakepakupi.pdfIn PDF document text
    • http://acelybio.com/upload/files/58568127890.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131d2eea182b---98883268450.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/jusej.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/99107908217.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/sufapawajezide.pdfIn PDF document text
    • https://automatisme-portail-bordazzi.fr/userfiles/fichiers/sapuso.pdfIn PDF document text
    • https://galaxy-training.com/userfiles/file/68415625708.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/9ea507ed3f7b5849f900a6ecd4757515/bixagop.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/a03f3fa193fc73e817fabd403bc85338/filiwimezegatonasabimex.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/31353222804.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/23340b0f5362352583a44bb970afdb7e/tuxapipabukulu.pdfIn PDF document text
    • http://kabaretyimpresariat.pl/Upload/file/zuxuturagonoxuvelalegu.pdfIn PDF document text
    • https://rajatotogroup4.com/contents/files/30589029313.pdfIn PDF document text
    • https://intersat.lv/files/file/datetunovopelibipiwabe.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/rifodibar.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202109100942185006.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF423 18492 bytes
SHA-256: e5acfa6d76eb2a3e97e2ec5086e8e3cde20a4ba4d92d7ee7f1e7d3c864206923
font_01_sfnt_off000123c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C6 10308 bytes
SHA-256: 6eadfebe98a0eb24f67c0137d26bcb3a94b21dc21f59859280f6b852a1760816
font_02_sfnt_off00013afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1