Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eed427193813485…

MALICIOUS

PDF

81.5 KB Created: 2021-09-01 18:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5ba3efb047904f4e472d3cc310cd2e20 SHA-1: 6e3c2fd236bf35421f5e2adaffa745485113945c SHA-256: 1eed4271938134857f96cab4eb4c3682bbbce603586ccb04f3a105c8ef8525a4
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous links pointing to compromised websites, indicating a likely phishing or malware distribution attempt. The presence of multiple external URIs and link farms on disposable hosting suggests an effort to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://chemonova.com/FCKeditor/file/52486132600.pdf In PDF document text
    • https://termofriz.rs//files/20326286850.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/6d2268a78675a4fc54ae0f5f9469eca1/65305378986.pdfIn PDF document text
    • http://sostrevalli.it/userfiles/files/tuverora.pdfIn PDF document text
    • https://ecoverservice.be/gallery/file/54692310414.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/4503e024dfdb8ede6f3b540fc7542472/17481094207.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/jj56go4lvlcmlrmgk6h32g4id5/zefapex.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160770233c6f6f---vofujolamagisu.pdfIn PDF document text
    • https://www.studioline.ie/ckfinder/userfiles/files/192259088.pdfIn PDF document text
    • http://tuvanthanhlapcongty.biz/upload/ck/files/23911893905.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/9640654969.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9f94c8ddb---fojipimerididevin.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/73830e2c9c0fc33004e9614dd23d83bd/36731686429.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0a6eb32ef---19934108914.pdfIn PDF document text
    • http://forresterfamilyreunion.com/clients/c/cc/cc72bfd2512333311cc1ef5a4fdef90f/File/puripunovatufufulegij.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b46377cba4b---lipeni.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/183349dbe150ccaed7fb630514e1e6de/72858433815.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ac0a003b4303af198c40f7f3cb3cf052/15635905345.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/jelogurepejemavipi.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2b66cf7a5---paxolalolitaxabavogos.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ea4b9a4c9---wezerotukum.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/medezupefitisukezerajufo.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/tafamanad.pdfIn PDF document text
    • http://huntland.hu/upload/file/23711968451.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/lozajufuzesulore.pdfIn PDF document text
    • http://etnorom.hu/pictures/68757397361.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=i+just+wanna+get+to+know+yaPDF 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_off0000da7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28C 17460 bytes
SHA-256: a1a13dcfec3dcdaaa743c674420bd3b5afedf00efaad21a19fa26ceadc1fb002
font_02_sfnt_off00011fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE6 10516 bytes
SHA-256: 8c40b7e2d28cdd0afaf1e7b116ab7eb8b366b0f39c1502eff30f1e386f11cc83