Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2407d05924739e9…

MALICIOUS

PDF

69.4 KB Created: 2021-10-03 19:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a17819ceeb2d5a378ffb00414b951cca SHA-1: f720a1629db96d9fd8bcec220a7a30701a8c8e44 SHA-256: d2407d05924739e9c60e5d735480aedb39740d46a728e25329baefbe1fc6dc1d
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URIs, including one pointing to a raw IP address and others hosted on compromised WordPress sites, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of multiple links to potentially untrusted sources strongly indicates a malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://dostrojar.sk/UserFiles/file/96746780223.pdf In PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/84334187469.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/599a2832ce8f388b79dd38482feb11fd/tuwalosoxuga.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/maset.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1614559d78030d---bifejozivudugeleritatinir.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/94255276831.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/gumidosukovekolejagepe.pdfIn PDF document text
    • http://kxzyjy.com/CKEdit/upload/files/nulodomoro.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/jimoxevotomu.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/799647361.pdfIn PDF document text
    • https://at1-turbo-j3t.com/contents/files/fovurajaledapevumugofe.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/99524423040.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/rejiz.pdfIn PDF document text
    • https://www.naabelectric.com/userfiles/files/74531927993.pdfIn PDF document text
    • https://atlanticcompact.org/userfiles/files/zuzujunisar.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/95507134519.pdfIn PDF document text
    • https://hiperaktivite.info/userfiles/files/likatulugaperanirozenasoj.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/ec7688baea719f0807bdb46265835031/76148161175.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/gevulapuguronabiwur.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/85435089357.pdfIn PDF document text
    • http://cjatkinson.com/userimages/vasowuxegu.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb4dd633f8---suzebazagudetejipuxokoso.pdfPDF link annotation
    • http://twilaw.com/files/files/8881756355.pdfIn PDF document text
    • https://samudra99.com/contents/files/25162551598.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/tosesekifumivozaxami.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/40682576465.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=one+step+dimensional+analysis+problemsPDF 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_off0000b2bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2BF 14668 bytes
SHA-256: 281e8f200053ab2f9bac765e89519dd1ed1e580a219bbd0645c8cf808eb31d64
font_01_sfnt_off0000d6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F5 10832 bytes
SHA-256: e9f4b75fbe9fa6b81501914c2af28fc3cd4e72d74a53f38461466fccae8fda4d
font_02_sfnt_off0000efc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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