Malicious PDF — malware analysis report

Static analysis result for SHA-256 58f59055095c7946…

MALICIOUS

PDF

113.4 KB Created: 2021-08-07 21:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6976a237192d66761674b410ef7b1842 SHA-1: 30eac40e535cd368d2acd021f76ac1818c0443ff SHA-256: 58f59055095c79462cd212ee3549b7e540feacf09f9e214cb0ce783a3fd515a7
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to various domains, including those hosted on compromised WordPress sites. The presence of these links suggests an attempt to lure users to malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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://bustotoronto.com/userfiles/file/navowofa.pdf In PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/7675402a91fd0fa842ef0ef329e6043f/51963981430.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/tapipakokorape.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16080115e678c2---lalejujilurusokoduse.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c056cc24fcf---18336292400.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/78b44f862022b5976609836a949d7de7/suzuvufavukarutunubitu.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/40113439680.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c676b4ce7---17387462838.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d1779b3d1---36942208780.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1s6rtfa8ue7r5tap2mi0jrttn3/92099930607.pdfIn PDF document text
    • http://anma.pl/anma_edytor/file/92716900319.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/vajegakaludepedemexalam.pdfIn PDF document text
    • http://eca.or.th/ckfinder/userfiles/files/laximaginawunutib.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e99db5b7de---32085101973.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/kuniv.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca74a19ee5---90878214362.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/dutesepotidisade.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/95878122793.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/73220429454.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/b580923f78d68f952b175d19eeb44163/26485497060.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16096b9134d4aa---77826063011.pdfIn PDF document text
    • http://nhasachconggiao.com/luutru/files/kutabusep.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6a85ed47d---mexivipipupazibosun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+connect+to+ea+servers+on+nintendo+switchPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13192 10972 bytes
SHA-256: 0f63b0fafe2873d75b9f90861b3d3a18693d1791db7fe80c0746fb8c0fbcf40c
font_01_sfnt_off00015522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15522 10564 bytes
SHA-256: 033b59ea39b3711b6bba9b6f238b28aed3e2255c932f33708cb669780e6ce4c2
font_02_sfnt_off00016d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D2E 19120 bytes
SHA-256: 3b5b58cde4e8e5ac9f588a1433937148c1df7f714220902fac3c649ddfc7775e
font_03_sfnt_off00019f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.