Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a89fd46bcb9a1ab…

MALICIOUS

PDF

79.8 KB Created: 2021-09-19 19:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: 70309d190de21d8ce2370aefa8f46d9a SHA-1: 77cc8b13c7408ef3e33a43413b38901c2a4bd5cd SHA-256: 4a89fd46bcb9a1aba9e8bfdd0ac1122ebbad7a75b7bdc08235cbedc38c34d688
176 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including links to external sites hosted on potentially compromised or disposable domains. The ML classifier and ClamAV detection strongly suggest malicious content. While no scripts were directly extracted, the PDF structure and embedded URIs point towards a phishing or malware distribution scheme, likely leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://europartner2.pl/uploads/nalajaputuze.pdf In PDF document text
    • http://hasdeu.md/data/userfiles/files/49360383955.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/dawuge.pdfIn PDF document text
    • http://pribatu.lamilagrosaimport.com/images/files/lixivuredirudin.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/161395ccb0b90b---85877604434.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/8q2nd5gdv2d6al38c5kfta7v32/dirimodidivaz.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/fupivenaniluzuxofi.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/xafewurate.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/risojan.pdfIn PDF document text
    • http://artc-polymers.com/upload/images/files/gisavomataporejiber.pdfIn PDF document text
    • http://lonniestireandauto.com/nbloom/fckuploads/file/lotedakegujid.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/77780419278.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/delupapikigotesasa.pdfIn PDF document text
    • http://fitviewer.com/files/file/nuwax.pdfIn PDF document text
    • https://frontivo.ro/userfiles/file/38049227973.pdfIn PDF document text
    • http://train-in-japan.com/images/blog/file/51946056832.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/vuxivurekatafekelemej.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/9643868382.pdfPDF link annotation
    • https://lompatjauh.com/contents/files/70773734072.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/zevenexunaj.pdfIn PDF document text
    • http://china-miyaco.com/img/file/2021914183027.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/tawadewudad.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161376d5f9206a---94962260656.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/dazoruxasasodozimagoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=friday+night+funkin+fnaf+mod+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_off0000d1c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C2 10884 bytes
SHA-256: ff615acaa74cda6d1f55b15e9f4dbb67be0f058873a419e02e978374fc21f72a
font_01_sfnt_off0000ea7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10291 18160 bytes
SHA-256: 760546f1135cbd163a154f7097d0c6bed2699caa9efee1264ae74365b5c84426

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