Malicious PDF — malware analysis report

Static analysis result for SHA-256 46eb289ed4f9f4ac…

MALICIOUS

PDF

80.4 KB Created: 2021-06-27 04:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0ae0021925bfd8ac77b3fbf9c1aa6f4f SHA-1: c84d19c0440d7ac2a51fcd1f299abff55fb1a13f SHA-256: 46eb289ed4f9f4ac8a725ef8a0d377a69be1578ddf2d121ae92fa483f2c9eba1
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate this is a link farm designed to direct users to external content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

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://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbfc8c49d8---95686959038.pdf In PDF document text
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/kiavtoc0cmnj9o74dbe1os74qq/138247306.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799de07d4c7---80187767015.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/5sgkcdg4gppsmvjus0i8epas9l/dugufisidurunaxidix.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/34c30602d599506a9919bc72726672c2/lejoripedibawed.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/45310552500.pdfIn PDF document text
    • http://resheto.ru/users_images//fck/file/vomoguvunusesaz.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/04cd68302406331339556d579ddf97eb/34141044823.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/87052128131.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/14721558743.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/33553762392.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/he80nvs7lc5rc2ga1vo0kmrq31/zufijabitoruxuxilize.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160903207d00b7---40662574134.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606eca54e8587---21079418231.pdfIn PDF document text
    • https://agatanorek.com/files/file/zozeziduvar.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/6dad11ecd8458eea0270e018a72a0be2/52229396482.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/mg70k1snpau89ic1l183cf2k57/komuvidetaxudazerekab.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a7bc0891dc1---xitirili.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/vukidepunasod.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/e8d455175a4f7b02acd2423787771840/roxofupeka.pdfIn PDF document text
    • http://aqcons.vn/upload/files/69620769254.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/lujesijupikurib.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/66042012255.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/36155981537.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=clear+harbor+dominicaPDF 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_off0000d571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD571 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED83 18300 bytes
SHA-256: ab293174fee28258d871849853521aff38c453b58233885f472705b8444020d2
font_02_sfnt_off00011ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA0 10540 bytes
SHA-256: 1b98a1e37bf2ebd2515b2e9532edc6b2e246c2a63b4d8302ab2c73bcf11bbc96