Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab8399a9928a7f0c…

MALICIOUS

PDF

74.9 KB Created: 2021-09-06 15:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 225b5c4b378053e45b310c9f25dcc0ad SHA-1: 964ecc7801018d985de470dca15131b87f16724e SHA-256: ab8399a9928a7f0c176f67b203147e82c982d833cf4bc82b7f3204972a1f6ed7
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, detecting it as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised websites and disposable hosting, likely intended to lure users to malicious sites. The document body is unreadable, but the heuristic findings strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://nadiadsa.org/userfiles/file/51300119611.pdf In PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/9dfbb57c7c6cc2d53bf5ca308fe273d3/32999524436.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160996ef9f134c---38474006680.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/e63b146d01756112722051106071e257/xeberowinedusupage.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/10133641023.pdfIn PDF document text
    • http://jowinbio.com/upload/files/202108071430421715.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/33736922065.pdfIn PDF document text
    • http://greenworx.eu/images/uploads/files/kerapuwabamovadakebazir.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/49b8f165e6c4dd7f4cefca6ee0187043/josabafamometawiriw.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a5db8247ac9---27779390503.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/nasijovokotavosifaxow.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/6e8a28c0027c221498c177f9dc0f2d3d/wisagowilumujogale.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/16898828849.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/hasjfc550bu51bmqid6m2okhv2/13881884269.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a5972aafba4---43203483008.pdfIn PDF document text
    • http://matkinhantai.com/luutru/files/852577088.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/75088820956.pdfIn PDF document text
    • http://stpatricksreunion.org/clients/84553/File/84060126946.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/7os6leae7t65bjujlhpqunga27/83719247657.pdfIn PDF document text
    • http://jaatkinson.com/userimages/milaf.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/sabazuruped.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021071718073220.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbee05c11a---sofunirul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=gseb+12+science+chemistry+textbook+pdfPDF 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_off0000bb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB92 11336 bytes
SHA-256: cfb8d0181ab30b30157ef29eb1c1ad26152658ff1eeff580ed384f5e4f2392ab
font_01_sfnt_off0000d5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F0 18616 bytes
SHA-256: df07647c11d971a9512450371a2a525884c3010730fa17dcd25d82bf0c1762e8
font_02_sfnt_off00010604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10604 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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