Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aff5b73049cb232…

MALICIOUS

PDF

85.0 KB Created: 2021-09-14 13:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c761ecec32c59d72708bb07aefab22dc SHA-1: ada1d05746952d1df93f2a646e94ac440443e688 SHA-256: 6aff5b73049cb232c26a0ee5968d027cb1adaed0bce6279d7938e10a08d5a42e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://promobryansk.ru/userfiles/files/motiziwusazu.pdf In PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/59345497168.pdfIn PDF document text
    • http://tecniagua.es/uploads/ckfinder/files/wulaveniniwutakudib.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d32358c617---lenepive.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/61097239796.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/31276415549.pdfIn PDF document text
    • http://egyptlance.com/userfiles/file/44710684581.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/6769516632.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/zinebupun.pdfIn PDF document text
    • http://an-professional.ru/img/files/file/lapabubaravave.pdfIn PDF document text
    • https://www.orthovision-lublin.pl/ckfinder/userfiles/files/82945787563.pdfIn PDF document text
    • http://cameragiaminh.com/upload/files/giwixefadaje.pdfIn PDF document text
    • http://thietbiotoviet.com/Images_upload/files/rozunimuzikejipajojanedu.pdfIn PDF document text
    • http://eternoohydro.com/d/files/93294953388.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/161403d59e18bd---90966503811.pdfIn PDF document text
    • http://khocabien.com/uploads/files/zibazifurodurukupapujuto.pdfIn PDF document text
    • http://hsi-international.com/ckfinder/userfiles/files/73903252713.pdfIn PDF document text
    • https://polandpools.com/contents/files/41369948160.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/74741014357.pdfIn PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/jewigazinafilixe.pdfIn PDF document text
    • http://pioneerbuzz.net/userimages/85600180981.pdfIn PDF document text
    • http://96rangjai.com/userfiles/file/rivevadexurorujatet.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/goxuvifezomo.pdfIn PDF document text
    • https://onlinendttraining.net/files/37914346675.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/vt2jovjjvkd84s3q8vn0gno1de/5190058033.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=android+adblock+in+appsPDF 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_off0000e7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E6 18264 bytes
SHA-256: e326078722b5322245d04b6aad1562a1b07c24a6e222a94cbb23ac9b8e9b0e64
font_01_sfnt_off000116fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F13 10488 bytes
SHA-256: 79abefa503b1d66710b7083973d7ebf647b46a6d0f259b9de16f14cbc3fd15e8

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