Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa270a0daaf200e7…

MALICIOUS

PDF

75.3 KB Created: 2021-09-03 05:34:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: be23146be6e859afb18a098a2e3a11c8 SHA-1: 58c88f72db327106c562b46096a1dc5e0a207b24 SHA-256: aa270a0daaf200e77d38f16b137ae0175194fd75cfec2291a96c8cc579579421
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting. These links likely serve to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://jca-t.com/fck_image/file/weguximisawuwuzemebeti.pdf In PDF document text
    • http://bazis-expertiza.ru/ckfinder/core/connector/php/files/90689447482.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/debcafcdccffd431cb0093f72d438b34/37496873444.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d26980d8d---sanowebubefefagofifukuje.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/49874432953.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709c0da20e9---zawubakoxexitej.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/xukuwidokolotudeme.pdfIn PDF document text
    • http://nghieuphong.com/upload/files/72721882627.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/74349453835.pdfIn PDF document text
    • http://beccaro.it/userfiles/files/xejigesud.pdfIn PDF document text
    • http://taniaandjohn.com/clients/874109/File/rujuzofomiz.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/soxakotukefaledalanixomop.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e66d552730---39430256816.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/u1mumndj2g8t5pdnm0hknsjoa2/tekumemukemom.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/57767567531.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/18723be42d07cac90895690e4a7965be/pedapometotobixabubogig.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/892a6917e1212a5127cb4674c088b46b/kanekanikodipabovedobi.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fac4fa66ed---dipidorunojanesinopu.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/01vqct1aalq2dmnrssu6cjgk54/96429655368.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/16617383802.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/v00f7ftrg58ild8v339omvahg3/lizowukawunofuxigawira.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/2508310456.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/3493351694.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/37289110231.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=mole+mass+molecules+worksheetPDF 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_off0000c300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC300 17208 bytes
SHA-256: b6458ca2db3b5bac0072235891192977449b91403d316cd29dd1bc232ce167ac
font_01_sfnt_off0000ef92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF92 10572 bytes
SHA-256: 2276238b95328bd9d11337a3c8ed40d40a49a6279858c152e5d6637e2cfcd8d3
font_02_sfnt_off000107dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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