Malicious PDF — malware analysis report

Static analysis result for SHA-256 01da891640d786e3…

MALICIOUS

PDF

74.1 KB Created: 2021-08-16 08:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: bd049370890c1275852d8ea682a804b5 SHA-1: 29176ecf5c306fc76583c66802762e54d30b0d70 SHA-256: 01da891640d786e300e28f58fd9f272c9e0e1c61b6af6bf7ed70caacb7a34abd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised WordPress sites, indicating a link farm or SEO poisoning attack. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing or malware-distributing sites. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document designed to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://synerhu.ru/uplcv?utm_term=pubg+telugu+dj+songs+download+mp3+naa PDF link annotation
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/roao80r3j58ahjb07kt4lnvhvu/40746663565.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/kajojujoxute.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d22e5459a---13938898429.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/12213317964.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/ziwugekomusejenoz.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/rualpv5e7fi2m458a2eu2hil8p/33421848500.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/zibosuririsusovemefawa.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/etn5dodv40228hg6e79u6r1sm3/daguzo.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/11261581670.pdfIn PDF document text
    • http://0965818789.com/CKEdit/upload/files/nefidakekozaz.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/pegevonuvebut.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/juzebededetomolawijavere.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ad3a47dd8---lavozozijumane.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/20999547795.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/62cc1bd17750801680e3fee1828014b8/vuluwukudikab.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/fofifuni.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/8bf1fdc5d409c67a9cb13b3cc99353ef/79683009526.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9e78a00d6---17723083836.pdfIn PDF document text
    • http://montesantangelo.it/files/files/34963619455.pdfIn PDF document text
    • http://parcfamilyreunion.com/clients/b/b3/b3ae52aef0329bb57e848b27182677c8/File/xadifuderojepefi.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1a4bbc8a7---vozisanexobumal.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160926aee67766---luzage.pdfIn PDF document text
    • http://drive4smilesontario.ca/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/fiparadoru.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_off0000bdd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD7 11172 bytes
SHA-256: 30db9ce37d9a2163a42989bcf907dd773a7cf780155a1f88256b6931e9879a90
font_01_sfnt_off0000d7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A2 16604 bytes
SHA-256: da3d7b42cfffc64d12be7d88abd6771eef3229618a50f44bf537b67f996535a7
font_02_sfnt_off00010300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10300 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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