Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3aa0bef87316975…

MALICIOUS

PDF

72.0 KB Created: 2021-09-05 18:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ab8c141b15f071cf349345ae58fbced3 SHA-1: 49a1ad3b020fe4f6fac3bbfc58ced8e968f301d5 SHA-256: c3aa0bef87316975db0187f24b598eeabb531eb28c06c61098689ebcbaaada1d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, embedding numerous URLs that point to compromised WordPress upload directories. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d7757d8f9---vukasirebasoba.pdf In PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a11e904d623---rasalojidejor.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/dilobifipadujadofigatawu.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021090109325373499.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/62414039454.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb5d8de962a---tunewanexududavefenixo.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed3da28607---8053194502.pdfIn PDF document text
    • http://adhdesign.de/userContent/files/20210607122017-lukaxerezaxeluzubov.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/pcsp5hfdivpvfcc5adps1qfd5u/kuxelizarafifomubo.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/26521305773.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d813d7cbe55---juzevakojoduvirofotirewaw.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609850d44ef7d---25903287652.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/27225945015.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/pumapujaduxaloxovalixi.pdfIn PDF document text
    • http://kukubara.com/zdjecia/file/82182287603.pdfIn PDF document text
    • http://onmamtour.com/FileData/ckfinder/files/20210821_A3AA2A77AF23BED9.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/mitusulevewagewevasopasot.pdfIn PDF document text
    • http://csc-vietnam.vn/uploads/userfiles/file/nowewagivodabelinokakati.pdfIn PDF document text
    • https://okud-istra.hr/userfiles/file/wezitobit.pdfIn PDF document text
    • https://yar-net.ru/userfiles/file/87398969359.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161164532d8755---44944703956.pdfIn PDF document text
    • https://angkagenap.com/contents//files/giwav.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bfb763d39---tirevajidiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=bombay+times+newspaper+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_off0000b9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B4 11008 bytes
SHA-256: 088eb3265eb5fe4afaabcf5aabf5660d9b8b9b3e36a6b1d4c330ff78c950331c
font_01_sfnt_off0000d333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD333 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB45 15452 bytes
SHA-256: 345cfeb3796a86f9b8e7340a9479ff6ed50272590c5ef1bd20ef9ab8e41af843

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