Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6bbc59ea581d75…

MALICIOUS

PDF

73.2 KB Created: 2021-09-29 02:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2520903cf42d52afbb8b8f91c9bdd9f3 SHA-1: 4d245f1dfb5084a36afd62b629de2a5fcf2bda80 SHA-256: ee6bbc59ea581d75763e0f7749aeda27721520ae905248251d26ce7cf5be00e0
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to potentially compromised or disposable hosting sites, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://storemisr.com/uploads/files/pofolakogazojatopotani.pdf In PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/kumivaregunawegi.pdfIn PDF document text
    • https://retake.dk/ckfinder/userfiles/files/86406133772.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138dacd56bb8---xonopabulawo.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/26252606940.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161456d5f52dd9---gotawipuv.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/47559960030.pdfIn PDF document text
    • http://viorina-deko.com/images/file/xijepinirakor.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/mutopinojotel.pdfIn PDF document text
    • http://mosjob.ru/images/file/82783176583.pdfIn PDF document text
    • http://www.taxivanclass.com/uploads/ckfinder/files/venovodokofakunozosej.pdfIn PDF document text
    • http://cokhivietuc.webthoidai.com/img-vietuc/files/30003889149.pdfIn PDF document text
    • http://fratellibeninca.com/images/file/ratenolutogegijirifug.pdfIn PDF document text
    • https://excellencetogether.com/img/files/file/zugezemapuvisugotok.pdfIn PDF document text
    • http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/48507515030.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613696bf1840e---doliratogoxodefeguf.pdfIn PDF document text
    • https://widerbet.pl/userfiles/file/sisarewujukuwi.pdfIn PDF document text
    • http://indigobaby.eu/upload/files/25180827206.pdfIn PDF document text
    • https://winstar-tools.com/UserFiles/editor/file/34411039038.pdfIn PDF document text
    • http://homeopathyhk.com/files/gepepuwegogab.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/gebezexi.pdfIn PDF document text
    • http://miwon.com.vn/app/webroot/uploads/files/57926955218.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/40968901077.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/fisutedogujakadawemonevu.pdfIn PDF document text
    • http://tatvideo.ru/ckfinder/userfiles/files/rezofeduredepurawilusuzun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=geeta+in+sanskrit+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_off0000b62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB62F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE41 19628 bytes
SHA-256: 3bb4c1f864b104fc1fca156bae5de69852bfc65ec33dd4a4220c34ac14c8ce83
font_02_sfnt_off0000ff7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7A 10456 bytes
SHA-256: 1c9ec9b25bdaf30f4b7e23482a6376d62d126e67b39149daecf0be761533772c