Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e0f16849b68f6c…

MALICIOUS

PDF

92.9 KB Created: 2021-08-24 00:17:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 914d416ed05a098776a8deb232b051f0 SHA-1: 1e25dba99ad3d4b5bd1437682ab79ce33e117a25 SHA-256: 90e0f16849b68f6cf51036a517c751e08c403d0fa8f3ac2ab7ad5ca746073940
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded URLs are consistent with attempts to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://pistant.ru/uplcv?utm_term=where+to+stand PDF link annotation
    • http://www.anclupnapoli.it/userfiles/file/45551328632.pdfIn PDF document text
    • http://vigova.vn/Images_upload/files/69789836323.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e180c8cd101---13946322148.pdfIn PDF document text
    • http://maradonasalud.com.ar/ckeditor/ckfinder/userfiles/files/85344903077.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/xalob.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/xifujugapigerew.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b81f9e0dcddb5ff565bc8f09831c54d9/75941356071.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/38966275454.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4a08d5f7e---48566018194.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/f7505fd8a4145d9eaa0c0c79136342e4/40367128851.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/liwakivobom.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/sc0ln2m5oc1cv1bvd1aullicl7/86359527679.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/7071a83104c953dadf5883a42d2cd771/22406026226.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161182d09c99ac---86387027836.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160941d47ebfd3---kapejukimobema.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/17161237838.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e33da53f015---fupotonoxomunazuxi.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/81924557696.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210516/file/tirum.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210628100354_1d0z4g.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ab8710426---fofabew.pdfIn PDF document text
    • http://wenxuezj.com/images/File/91323310881.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a321e1ec66---24774818551.pdfIn PDF document text
    • https://dichocungtoi.com/userfiles/file/gurefuzosofezikusotigojet.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/6lno8224b1t6kbuvgja8ajt81d/katalati.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/bvgfvhq5sghfr7cifps5s2soe8/3628540449.pdfIn PDF document text
    • 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_off000109d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D3 16992 bytes
SHA-256: e0b7eeb79f376dd93e6977914815fd1244469f42a7b186a0dc0b9271cc825b7c
font_01_sfnt_off0001363c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1363C 10200 bytes
SHA-256: d723870648bc6bda1ecf53e0fe268113acc6389bd4c5d208ed154f68dfd2f0cf
font_02_sfnt_off00014d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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