Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0145042b0c009b…

MALICIOUS

PDF

78.9 KB Created: 2021-09-13 04:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c707b744dcea49ee3cd3c87671c6ecef SHA-1: d53c15be01dc69f45e57976e87aa359bd7a9fe03 SHA-256: fd0145042b0c009b210b9586621b4cdd1875fbd6e995230f4d362c225ab2a831
176 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable hosting and compromised CMS upload directories, suggesting a link farm designed to distribute malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URLs point to a distribution mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://molenat-energies.fr/molenat.com/images/editor/file/doxizironep.pdf In PDF document text
    • http://tgtech-auto.com/userfiles/file/57828646269.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/43520895725.pdfPDF link annotation
    • https://birsamundapark.in/userfiles/files/35107636693.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/39216870178.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/92281617068.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/zegamobukezogesumemopesab.pdfIn PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/laroto.pdfIn PDF document text
    • http://kaitianjinghua.cn/admin/userfiles/file/202109130355075134.pdfIn PDF document text
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/nejovaluzudogakusavo.pdfIn PDF document text
    • http://otworz-biuro-podrozy.pl/userfiles/file/xipudedanazegif.pdfIn PDF document text
    • http://studiozoppini.com/userfiles/files/rapix.pdfIn PDF document text
    • http://rexant.by/upload/editor/files/280957295.pdfIn PDF document text
    • http://hissekurban.com/resimler/files/tinilewajudadajaje.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/jeruxoba.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/basimosasaruneluxutitewu.pdfIn PDF document text
    • http://vetportonaccio.it/userfiles/files/40724371773.pdfIn PDF document text
    • http://jayeonrak.com/upfile_editor/2021/files/labem.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/6d6e35725ccbb823144d31f06df433dd/puzoziruj.pdfIn PDF document text
    • https://shinaltd.ru/images/file/50758528919.pdfIn PDF document text
    • http://bud-drog.pl/userfiles/file/99645328641.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613693d2e1f88---88306260606.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/73590894127.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16135c3b44bf65---94687861410.pdfIn PDF document text
    • https://znalac.com/userfiles/file/94040293111.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/46412334303.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=windows+download+chromebookPDF 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_off0000cb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB8D 18784 bytes
SHA-256: 8dec1f029b5b42e0d69bcb36c10202d528dd2de0e8ad7462354328d76a19bb5a
font_01_sfnt_off0000fc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AA 10848 bytes
SHA-256: be2f25c535d36ef5331a8d3b6607d6e4c2bb1dbcacbaf78d986ac648fe87fcfb