Malicious PDF — malware analysis report

Static analysis result for SHA-256 47724ad7ee5bcffb…

MALICIOUS

PDF

79.3 KB Created: 2021-08-14 12:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 487303f89b461ad3bfb2fe6f9832d9ac SHA-1: 8f9b4dba706b88f7f51ce8f72b4d61fade593a6e SHA-256: 47724ad7ee5bcffb1c3aa599bc513c24519b010dcc9d719ae0ee5cf924e4ba5b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It contains numerous links pointing to compromised websites, suggesting it's part of a phishing or malware distribution campaign. The presence of link farms on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893971636bf---jiwuvowelazi.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a55334f339b---63468759402.pdf
    • http://sparan-art.ru/ckfinder/userfiles/files/nilenejuwitewi.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/39s16l8kfdgo36976qtorb19t7/90281034624.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6a1938b9c---bogiga.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d4e5cffd1---kunotatigoxukogogojikaxo.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/33d3d3c3a9ff9b2fcfef3889e3d81426/45026294881.pdf
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ace2a3440c6---55948372838.pdf
    • http://cdmatik.com/uploads/file/befalesozomukasegaminom.pdf
    • https://eingangrad.ch/userfiles/files/91794134782.pdf
    • http://hgbs.de/userfiles/file/rovibemugow.pdf
    • http://vorne-sitzen.eu/pcms/content/file/zorizixelefilukubux.pdf
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/5d3130861975bf5933ad02cb66b13c1a/katukawipekabamenino.pdf
    • http://essentielles-theater.de/UserFiles/File/vimawowugudox.pdf
    • http://tfwdynasty.com/clients/f/fc/fc55782506b94f933057639757072b2a/File/3726085010.pdf
    • http://mmbc.cz/_data/user_files/file/viwavomaleliluvit.pdf
    • https://cepatdaftargroup2.com/contents//files/16102052751.pdf
    • https://bostoncake888.com/UserFiles/files/96411373164.pdf
    • http://backupcenters.com/userfiles/file/nevuwobu.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/321067e6265c8609a593263ae022ab63/94038922898.pdf
    • http://specimport.by/files/files/bisiremamuzikuwu.pdf
    • https://posaonakosovu.com/ckfinder/userfiles/files/4356440079.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=que+haria+maquiavelo+stanley+bing+pdf
    • http://e1pl2.nazwa.pl/busy/fotki/file/73861639375.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_off0000cf49.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF49 16792 bytes
font_01_sfnt_off0000e75b.bin
806418367315ced51971b423e4915c8c5a0caa762981573b396b5bd7813e3746
pdf-font-stream PDF embedded font (sfnt) at offset 0xE75B 17980 bytes
font_02_sfnt_off000115a3.bin
cf43bcac0e05f0c9c931ddc7e574584baefea243575328931a25146e8262ccfe
pdf-font-stream PDF embedded font (sfnt) at offset 0x115A3 11568 bytes