Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c82b9a80d0f447…

MALICIOUS

PDF

80.9 KB Created: 2021-07-02 03:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6eeb8e2df8b9ae29959a5ba091e7d88d SHA-1: efb22d8b0cca88570f47a06433aa87d9d8263a4d SHA-256: 56c82b9a80d0f447aeda6c8e63fc78311e5e417ca96e0dce9a56d56e240fe714
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many pointing to compromised WordPress sites. These links are likely used to redirect users to phishing pages or download further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://archism.ru/uplcv?utm_term=carmike+theaters+aberdeen+sd PDF link annotation
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/vrsj0t0hgbabr44qt345hkcsft/wivoveletedeko.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/ff3e4d8969f4ab6b0133ce41079f1c13/fejonumavigopibuwa.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/4rabk675ntoos6b10e39tfnber/28062320604.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/9683165504.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/e2f49f4560a2210152b22c18fd75beba/rigizapesokib.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/38159058826.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf4586b9604---64832881081.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/42528845920.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/69159996647.pdfIn PDF document text
    • http://longthinhphat.net/uploads/files/53639440640.pdfIn PDF document text
    • http://tw-go.org/files/31951070331.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/xawadel.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/jegam.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160755f7089706---mepatof.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cda4b1f3d2---40687278818.pdfPDF link annotation
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/1d3c6689942f615ff388591fb52f4474/guriwegodumo.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/cb6f7c628ffa7d0ad518f5d8e74f892c/wunizakazaxesora.pdfIn PDF document text
    • https://oversaslogistica.it/file/11526408342.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/84534717592.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/d7a406a1fb55a975244b7cf075e81120/mifopokef.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/681e06b21cad0bc6e28abb626fbf89dc/66770576407.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/putowelejabogepuzo.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/sexen.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c9827e4b538---lobonazonirasukekon.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_off0000d764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD764 17392 bytes
SHA-256: a619415fc1d28f2c1e1db18141bac81416cbb804e3e0a76affaa0ba1b8c60c6e
font_01_sfnt_off000104bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BC 10608 bytes
SHA-256: 3bfb8de0c02a81795f2b1324e3fecc3be6f3eb6dbaeb19e391b0fdf56fbda5b8
font_02_sfnt_off00011cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1