Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be4ea314bec5a67…

MALICIOUS

PDF

81.2 KB Created: 2021-09-08 21:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ab21ad9f42cc1d769208718bc67f351e SHA-1: 52da2d652ed35e9dd674cdb50eab69d67fd8aafc SHA-256: 0be4ea314bec5a67e3d7fe931a126520347fea457aa3024624b009c0afd01121
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to various domains, many of which are hosted on compromised CMS platforms or appear to be disposable for SEO purposes. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://newcar-rental.com/uploads/files/202109020621483842.pdf In PDF document text
    • http://zeci.nl/im/image/gobim.pdfIn PDF document text
    • http://www.klimavill.com/data/editorfile/gezebomexolavif.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/14f559347fa5c4b106133adb3258dfaf/fifisarosodabebiwibefofu.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/3206874110.pdfIn PDF document text
    • http://goang-hann.com/uploads/files/202109051725499097.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/p0v062vn1p2jlt1ogtns3q6cj5/ramukax.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/nafiz.pdfIn PDF document text
    • http://ksiclubbiz.ksiclub.org/svnprojects/DHD/Source/images/files/96778895267.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/89104734510.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/vuzaxosodakevowelupuve.pdfIn PDF document text
    • https://autopsrus.aerovents.com/ckfinder/userfiles/files/43479365652.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/puzaduzubavopafulasomofoz.pdfIn PDF document text
    • https://www.afoa.org.ar/backend/ckfinder/userfiles/files/3207608721.pdfIn PDF document text
    • http://giaodantanthaison.com/Images_upload/files/70110534119.pdfIn PDF document text
    • http://klm-co.ru/foto/ck/files/lemuwedisikibinuwisuwagib.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/vopesowelurulowal.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/sabumolokumemosirovaxumaz.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/xudobojotafikirapeli.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/84312249965.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/70616544993.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/faxaxigoguw.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/rafunobexalakaganololi.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/161367eb3cfcc3---jozejekezorijadeti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=step+calculator+app+for+androidPDF 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_off0000d92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92E 17640 bytes
SHA-256: e915ed0deeb3b6fa92e02e3cfba91a4d6acbec7a38dcbbd0fe8e973e3f5a46bd
font_01_sfnt_off0001070a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070A 10620 bytes
SHA-256: 2cbc464d2cd944229c8e606bf0c76b03e7b3321029922983b6bcc8f3d9d70559
font_02_sfnt_off00011f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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