Malicious PDF — malware analysis report

Static analysis result for SHA-256 c099241756e58d60…

MALICIOUS

PDF

83.9 KB Created: 2021-09-05 14:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fe59509548679f1d812c7b0621a25aea SHA-1: df83f910d201e3f42d2eadfa9ccb2b1d21cbb385 SHA-256: c099241756e58d60195aa3622d4fae2ceb8ac61694efae00dae14bc8fddf5621
184 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It impersonates a cloud document service and contains a download button lure, suggesting a phishing or social engineering attack. The embedded URLs point to compromised websites and potentially malicious files, indicating an attempt to trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 8

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3de6741b2---14954625720.pdf In PDF document text
    • https://ladangmimpi2.com/contents/files/zozinexid.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/zeturutijima.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/56c4519ffc331c13dbf819b1fa9dd262/7651954518.pdfIn PDF document text
    • http://bookblog.kr/data/file//files/dosawobawegemozeba.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/megonozakalunedaxesis.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/jazomekakawu.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a41b32bb3c0---32842486978.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/161154c6272a12---genipevemugobizoto.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/36887022808.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/0sknbuh9g7lkuc340jq9mdie1u/66815908865.pdfIn PDF document text
    • http://parcroyale.hk/userfiles/towarenafasawaxus.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/vujulejapexomimifuxemasud.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16080942c4a64c---52280591138.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/bf31b583012fd466773c24f86d4f3320/zupot.pdfIn PDF document text
    • http://jp-photo.cz/soubory/files/dobamowipojinon.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/62169994558.pdfIn PDF document text
    • http://sineadstone.com/userfiles/file/xojuvipetis.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160791f803a6d1---dadizolojij.pdfIn PDF document text
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/0h7hnrns1tse244516sa4c82k2/dezebemebedixamamo.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/40458776444.pdfIn PDF document text
    • https://keluargamimpi2.com/contents//files/21341966841.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/voderilazifijujomoja.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/10092710513.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/a05a4565469d5227b5e4847187363e0a/98270920349.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b9bfe442e71---jadomawewe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=google+docs+save+as+pdf+ipadPDF 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_off0000e34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34B 10596 bytes
SHA-256: 16b7e4016884ead3fbc937b1a03aefcea661d2b978ff299bc1c764efb2cbf3e3
font_01_sfnt_off0000fb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB73 17788 bytes
SHA-256: 48941a217ba409249493041c2c40e4f2945881ae636746135d5671e9ed5d9bab
font_02_sfnt_off00012970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12970 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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