Malicious PDF — malware analysis report

Static analysis result for SHA-256 245e367a30fc996e…

MALICIOUS

PDF

83.0 KB Created: 2021-08-20 12:33:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: d7aac45b94cdc685a670fd809e0932c2 SHA-1: cdece8502fe3f269f4f77aaa89c4dfde5f7457f0 SHA-256: 245e367a30fc996e16a1cb5f2d1e5eba3874db0ec22c3d1f114e64f271b4b2db
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/42b25ba31b342a36834c8924ff9b5067/97932422280.pdf In PDF document text
    • http://lnimeina.it/userfiles/files/13175394856.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/wufipimedalotibuvetox.pdfIn PDF document text
    • http://maplewoodmachine.com/clients/1/17/17f0ea2532424b9b8bf99baf53cd3763/File/nalotajitobukaburazupubiv.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/005pq05a13m4a67o03v43euar3/30742100329.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/17582091710.pdfIn PDF document text
    • https://art-lamps-rali.eu/files/file/puzowexonaxobo.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/fc5839cad62d91b39703dd69f722bd1a/kujufifebefarerot.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/43352729556.pdfIn PDF document text
    • https://maintogelonline2.com/contents//files/womasutoximonizewawiwotir.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/gipipexinenebelela.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/161119d8a91d6c---80015042590.pdfIn PDF document text
    • https://hmradiatoriai.lt/images/files/94275841947.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/xevilo.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/wovawasoxoxubogipudeka.pdfIn PDF document text
    • https://ivanamihic.com//files/tadix.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16115097a3f140---22276670688.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/bipelimis.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/81019sg0cspn4e2emukb554j43/57400734925.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/4da9b16f584045caf24ad449c5f4b377/86031957059.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/38806948293.pdfIn PDF document text
    • https://vegastel.eu/components/com_mijoshop/opencart/image/data/files/61707302961.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=shubh+mangal+saavdhan+full+movie+watch+online+free+123moviesPDF 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_off0000de9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9A 16432 bytes
SHA-256: c3eda86e79359d6ccd1771ae0980ded48e3456b6a90aca6ca80e5997dfef40ca
font_01_sfnt_off000108fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FD 11732 bytes
SHA-256: 427bfc13f58b4da554ebb5400e1b281755c8ceaf49a15c5d3eb4b53d62c02a59
font_02_sfnt_off000124c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1