Malicious PDF — malware analysis report

Static analysis result for SHA-256 be349b17729af4ab…

MALICIOUS

PDF

75.2 KB Created: 2021-06-11 02:13:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75e76b14c01dabe2fd375345d6628810 SHA-1: 9c12def39028cac856dfe858d209471f2a4ec858 SHA-256: be349b17729af4ab30709f98a4f38f639b4d847a635a9aa2452947b8cdb19754
164 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript and a large number of external links, many pointing to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nomylo.ru/uplcv?utm_term=clover+water+cooler+leaking
    • https://imad0c0.com/js/ckfinder/userfiles/files/kojodat.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/7588ef4e9f55f4550b889d0f28997e99/pagozudamuxejuxi.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/24d4a1f913116e80731c5b3d748e9ae8/wajorabadufogave.pdf
    • http://jingluo.net/uploadfiles/files/jolomawefemubufemotidaja.pdf
    • https://iword.de/userfiles/file/ganuborib.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/9bad2b793fd7ee51de1596ff2b09a1a6/60916952837.pdf
    • http://solamsys.com/userData/board/file/40438592886.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16082bd9ae7082---49010826935.pdf
    • https://proxus.nl/file/41366876808.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/cae4e97d4fc57df00db9ec3dbb3c901f/fugatupuxozanegufutufak.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f863f6167c---baxemok.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/3fbf9448796384167d4105142c4f6e6c/fixasisubalusezufamatages.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607470391efbd---duroj.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609182ac3698d---gineranojulejoza.pdf
    • https://alihuata.com/userfiles/file/daxakorizedowajokisi.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077946aaeeca---56592225819.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4f67bf893---9870087603.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2f107898a---31712431937.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6f2.bin
7be46d574106659ac43ef5f3fd470bd69203df544b57ef42ced3d51a5c1d11c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F2 4908 bytes
font_01_sfnt_off0000f7ca.bin
2b0983b6ae31f57e8abcd3b690e60954744a6f4c176422307f721d340c746f94
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CA 11328 bytes