Malicious PDF — malware analysis report

Static analysis result for SHA-256 5716b9054803260a…

MALICIOUS

PDF

64.1 KB Created: 2021-06-01 01:00:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a81866bbe24862170e52aeeed2bef101 SHA-1: 0029387ac1b7b65db75a8161dca6a2258df232ed SHA-256: 5716b9054803260a914fb1a9a986d351e88e963d4733b661d2cc3d3c63e06c4d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document functions as a link farm, directing users to download cracked software. The heuristics indicate that the links are hosted on compromised WordPress sites, suggesting a tactic to distribute malicious files. The ML classifier also flagged this PDF as malicious, reinforcing the assessment of its harmful intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8579

Heuristics 4

  • 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
  • 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://crewmak.ru/uplcv?utm_term=korg+pa+manager+v3+3+full+crack
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/e06ea48d58e65ac35b0faaccc7c0292a/gasetuwomugexipasinavul.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cab0037295---jevapij.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/56745001c156952135d70de3409acb15/tanejubitikotelazegesa.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a595444de2---wubazamotasudarado.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/f36dad21b2715933324724fa5e65e258/jugurinadafuvodezonujel.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/3911b411debadf55226b377d35f1449d/18651077135.pdf
    • https://alianzatours.com/imagenes/file/30920296593.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16082775c6d270---tejiki.pdf
    • http://0vote.com/ckfinder/files/58760159187.pdf
    • http://www.allatpatikapecs.hu/images/file/18766170430.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/c66d2ca7ff0a7cf55aa1ecc264d549ae/53044997179.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078062a81747---pexurufiwavox.pdf
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/8mnip8o5chn9o6vvep4j9ectm7/govosafeliremexa.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607481b5706dc---tilajo.pdf
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ol24rbjv6gip8u2m8bha1dicca/71331064763.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc0f4a3501.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/snf5f0sun24est0298vsigkii1/7894430549.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd04.bin
1865ddf3e86915b27c8d15998af2440d43e7ab32c9b23049828578643370f7c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD04 5412 bytes
font_01_sfnt_off0000df79.bin
806ded62498b26baf504895651c23f60c7272e511945d5fc0ccacfa9a4b93535		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF79 10144 bytes

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