Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb323ae46a79bfd2…

MALICIOUS

PDF

89.8 KB Created: 2021-06-25 20:31:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ff82c888c973d03a9737b0b12f29f055 SHA-1: 6c3df335a0284ad55e8a6b5314a170dc2f04a9d6 SHA-256: eb323ae46a79bfd235e57e0a16356c5fa22cdc347fec14eb388b5ae020ba42ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://pistant.ru/uplcv?utm_term=concentration+and+dilution
    • https://turismoporsantander.com/aym_image/files/99841644026.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c26fba7e47b---80439383262.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f095a5791---83187611774.pdf
    • http://gaskinfamilyreunion.com/clients/b/b7/b798c9f9e2af69c3a5b950a06e4ade8e/File/21645670039.pdf
    • http://kiuruvedenlukio.fi/tiedostot/file/93372383126.pdf
    • https://108pizza.pl/uploads/userfiles/files/37298300376.pdf
    • https://superpart.com/files/62737857065.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082d76259993---48048295301.pdf
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/247fa524e9a72fd7cd0f7979191430af/tijufatiretudilexolew.pdf
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/62844289708.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/tmv2880cq3svkp4cf39oq2qhi7/94260314077.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073076fede5d---vanaxakokonuxud.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076e8e861368---xizidudiwefodeva.pdf
    • http://pokorny-podlahy.cz/UserFiles/File/balurumabonik.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbf140a32f3---34002980225.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/5f13a2e4d53d1f136221a6fc871343af/vojiki.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160943c7aa5354---26321344755.pdf
    • http://www.deco-interieure.com/userfiles/file/fodaxal.pdf
    • https://anfauglir.com/images/file/sijiwu.pdf
    • http://sewakendragroup.com/userfiles/file/niripewokalerudubufu.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075cc6e86074---10967199724.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/f44c37e43ac257bbd3d4605fab3f9751/mabegopubeduzoda.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/2h0s512s5fd49ntelvbtq21cr0/powalorewunerimoj.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/7e5a5490d299f40f53db3243b425d3b1/jaxafe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb41.bin
daf00b9f517853525ef594f58e2c8b65ee17ab622c4bd7d0d73409892560a59c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB41 17884 bytes
font_01_sfnt_off00012ab4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB4 16792 bytes
font_02_sfnt_off000142cb.bin
6a90af4245b3036ffe2118081fdd05fb879b943c4e82f447173977eb4ace3f52
pdf-font-stream PDF embedded font (sfnt) at offset 0x142CB 10328 bytes