Malicious PDF — malware analysis report

Static analysis result for SHA-256 10baad79893e09a6…

MALICIOUS

PDF

69.9 KB Created: 2021-09-30 20:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 728b8bd1984810ab8c065692e78f7260 SHA-1: e0e9279c9ff528004988f5791d33ace0183909e2 SHA-256: 10baad79893e09a6c72aad1f5c28773e90f53bc9ae89113dd95a241f8e5ab3aa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, many of which point to compromised websites or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to download further payloads. The presence of embedded JavaScript suggests an attempt to execute malicious code within the user's browser or PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://pixomot.ru/uplcv?utm_term=house+design+mod+apk PDF link annotation
    • http://missteenqueenuk.com/userfiles/file/detotizuxud.pdfIn PDF document text
    • https://qualitygums.com/userfiles/file/samazonafuj.pdfIn PDF document text
    • https://badrivishal.com/media/pedebuxu.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/hfj5bp900bqppcjusl9fg9agb8/femuvogitijonejeb.pdfIn PDF document text
    • http://filipdegreef.be/uploads/files/20812639790.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/74357653533.pdfIn PDF document text
    • http://keacg.com/upload/files/waketusamup.pdfIn PDF document text
    • http://lavalnerina.com/userfiles/file/tigalegalalegefikurimufu.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/5b5d48ee814c2b1d680420cb50827a61/kifatilazuwid.pdfIn PDF document text
    • https://vadihosting.com/calisma2/files/uploads/46949672873.pdfIn PDF document text
    • http://galluccifaibano.it/userfiles/file/12691260526.pdfIn PDF document text
    • https://gjbuyerbroker.com/userfiles/file/lonaxapomexumesu.pdfIn PDF document text
    • http://autostyle-japan.com/js/upload/files/wusimajovenaroron.pdfIn PDF document text
    • https://artinterior.bg/userfiles/file/53108885463.pdfIn PDF document text
    • http://giustizianuova.it/userfiles/file/nasemefuxaxebekugurujo.pdfIn PDF document text
    • http://bienbao.org/uploads/files/92589527850.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/nimamajiparigo.pdfIn PDF document text
    • http://westpakusa.com/phpsites/vertical_living/uploads/file/vuvirefiwetixarupud.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae99db06b4---tobudepimenovikej.pdfIn PDF document text
    • https://laptoptranganh.com/data/dulieu/files/wepisolof.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614748a6dff9e---76383568232.pdfIn PDF document text
    • https://lazeo.nl/userfiles/file/tegikiduxemuw.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/25605883030.pdfIn PDF document text
    • http://clerus.hu/files/file/gijavubapew.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.net/filespath/files/20210904115502.pdfIn PDF document text
    • http://letnipohar.cz/upload/file/7105813301.pdfIn PDF document text
    • 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_off0000b53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB53D 14476 bytes
SHA-256: dd0efa018c037122a48fdbb733eee9791f8d5cf3dbd921e9bc08be1d816e7bc1
font_01_sfnt_off0000d9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AE 10672 bytes
SHA-256: 08c4d5bf3f5b567b1a2d63bc372c3e7be65144a4839cfcc27eabdb6bc18b0780
font_02_sfnt_off0000f1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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