Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0ec61ae89428e3…

MALICIOUS

PDF

74.7 KB Created: 2021-09-20 11:35:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 72d500c538c944a75cfec11c50b37342 SHA-1: 183c6e641988756ed566458eb33137e98ee5ecfe SHA-256: ba0ec61ae89428e309db3f7a0a9588fed92f3d985c6cc73fddd8b5f0e8236158
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of multiple external URIs further supports this attack pattern.

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://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614656338893b---guneligusowiromijatufupok.pdf In PDF document text
    • https://bibonatura.com/ckfinder/userfiles/files/funaxoririnelon.pdfIn PDF document text
    • http://shiokuda1.com/contents/files/kavupizorasogozilelevafe.pdfIn PDF document text
    • http://trungtamsangloc.vn/uploads/ck_upload/files/juregof.pdfIn PDF document text
    • http://cheliabinsk.realxenon.ru/uploads/files/27125012851.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/niwadizeludojavaludazuxad.pdfIn PDF document text
    • https://saksisan.com/upload/ckfinder/files/televipugovo.pdfIn PDF document text
    • http://zhymwz.com/upfile/file/77079905790.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/zudosebarerimanogik.pdfIn PDF document text
    • http://hakanhurdacilik.com/userfiles/file/zabebiradimifirujibozu.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/vurelev.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/kozarazena.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/60853948322.pdfIn PDF document text
    • http://dobermanncz.eu/files/76569119303.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/5684242951.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/wemilasuj.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/rcb6p9d9o9cu6nkg0nrn4l9503/waguke.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/77635322946.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/2c46907b368c393fec1a5bf4d922a588/rixolisijetugedomuve.pdfIn PDF document text
    • https://familienbilstrup.dk/ckfinder/userfiles/files/71150245347.pdfIn PDF document text
    • http://spzpoz-zdunskawola.pl/upload/file/66394242317.pdfIn PDF document text
    • http://dfanchem.com/upload/files/raripibigo.pdfIn PDF document text
    • https://foodexgida.com/uploads/files/55387990502.pdfIn PDF document text
    • http://utcsp2.rustyramone.com/uploads/files/fadupug.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/19289807092.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=minecraft+latest+apk+softwarePDF 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_off0000bdb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CC 10644 bytes
SHA-256: 03125012bc6c12b0853294fde2d8f85a64ef1383932b32d9a7b5b5504eeb98d9
font_02_sfnt_off0000ee5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5B 18232 bytes
SHA-256: 2d8b349b675babb15fa1748a9fee3b6e9eb5ea1ec8bcba205b75f14c02fa156f

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