Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7036d3975670e2c…

MALICIOUS

PDF

83.9 KB Created: 2021-09-06 22:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3067dfe1b4c1433339229c6aef83704b SHA-1: d446e82a0dd8bb6194872388fecb5930bed2acf7 SHA-256: d7036d3975670e2c5e82806bd365c56d4988eac0413ece8498e8449e9109c676
164 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, forming a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. An embedded JavaScript stream was also detected, suggesting potential for further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://valeneighbors.com/userimages/lalovumudari.pdf
    • https://atamergranit.com/userfiles/file/45139798139.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d54c09cbe5---rarabitigu.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cdf84b3e361---lixavepomomunewufi.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607babf6563a4---16067340048.pdf
    • http://autofactory-jin.com/js/upload/files/lirodaxeguzalodasafojoma.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612955fe16eba---71208829293.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/27c93107270f4427be7a29428aa81e93/54118774501.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/7f1d192fbad634e0d589a4bd90282f68/44978735855.pdf
    • http://asupuro.com/upload/save_image/files/vafajivefepomivinaxu.pdf
    • https://langumeistras.lt/i/File/84100784630.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6722c6d17---gobosodeso.pdf
    • http://chsjackets75.com/clients/a/ae/ae1e0d6431e3080ad3d3eb1024a27f31/File/nunoxasow.pdf
    • https://jewfri.kr/files/image/files/34140192950.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078489a4f532---kafoleluxako.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160982e7687379---mawuwebogagavamu.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfa8e96aec---kokupide.pdf
    • https://fenixfalt.com/userfiles/file/96410932249.pdf
    • http://botosani.ro/img/uploads/file/losososufile.pdf
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/dumex.pdf
    • http://progettarecasa.com/userfiles/files/5576233030.pdf
    • https://kit-veron.my/ckfinder/userfiles/files/68710700770.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=usted+and+ustedes+commands+practice+worksheet
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc82.bin
ef21ea3497535b5516aa0a0560909abb100100e2fbf7743d9819c13035ccf00d
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC82 19580 bytes
font_01_sfnt_off0001103a.bin
92064ab1614f87ab6f40b5a1fb02f5432e72e7f5ad7d0264081ac62a2afd3a51
pdf-font-stream PDF embedded font (sfnt) at offset 0x1103A 11016 bytes
font_02_sfnt_off000129b3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x129B3 16792 bytes