Malicious PDF — malware analysis report

Static analysis result for SHA-256 47440dcf067a8449…

MALICIOUS

PDF

97.4 KB Created: 2021-07-20 08:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 70b7fa61622e0fda6160b0fefa29c963 SHA-1: d92aeab424b60cd7a5066d78f715078c775032ba SHA-256: 47440dcf067a8449bbe7dc38498b0d9f53f6284979a4ba8abb584d29b1ff13e4
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. It contains a link farm with numerous URLs pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution attempt. The file's structure and the presence of many external links indicate it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa66b5e4104---31372180969.pdf In PDF document text
    • http://ros-grad.ru/fck_editor_files/files/vuwiwapetipokisuxufu.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2bd4d9faf7---10028251459.pdfIn PDF document text
    • http://superpart.com/files/82780926119.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/b9fa8d7315553bb93799556cfbb462ed/51775963499.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/49045095121.pdfIn PDF document text
    • http://wphs67.com/clients/9/95/95f8299e8098c1f2c85aab0f7ead5e97/File/10589967086.pdfIn PDF document text
    • http://infunplastic.com/d/files/56636666270.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/89ee146d7223c9d73ef157338cf83bae/tosevizixamujavulig.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eef5ddc408---24416407788.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/pulopofojun.pdfIn PDF document text
    • https://immobiliaresancarlotrieste.it/file/74783496343.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b68c556dc---lumapawebeka.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b48e84818---rivuwumafidef.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/pivonobowagaxonarugi.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/cp7f0aub4k6f7a0pds05e743g0/3902999429.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160869c1399edf---piwabivasuporikixus.pdfIn PDF document text
    • https://chaplains-camps.org/upload_picture/file/vivitusuno.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2f96cfe3848729e00f6529da1ac9acc0/merobepidapakumorid.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/xaxap.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/19197108682.pdfIn PDF document text
    • http://argyler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bc994f358---pevebeki.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/59397753548.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=group+1a+vaccinePDF 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_off00011cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000134f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F1 16956 bytes
SHA-256: 3d3dfbf02b212c9f471826626fffe4e6b5385553d169df0067c2c4a8ecd97e27
font_02_sfnt_off0001614c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1614C 10312 bytes
SHA-256: 27c8e0315f5346c4d94b9811132dac3b71047ac2494940167a769b4cae8e3287