Malicious PDF — malware analysis report

Static analysis result for SHA-256 f362d0561cbd127b…

MALICIOUS

PDF

84.7 KB Created: 2021-09-01 01:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1ff23c4257a72738b0c4c587cef51a31 SHA-1: f9dfd0a939f0e31853607dcf3ac56a1f06690e48 SHA-256: f362d0561cbd127b559d0ee773e7df801b7915987636bea26cb3a65418cf2320
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous URLs pointing to compromised WordPress sites, indicating a malicious intent to redirect users. The ClamAV detection and ML classifier strongly suggest this is a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection or execution of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ad1b1f5a4---42453975200.pdf In PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/09583d7fdc5f98d6a8bda0f270513da8/69543614009.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609b51095c38d---47550221912.pdfIn PDF document text
    • https://stancijanegrin.com/UserFiles/files/domonidimawid.pdfIn PDF document text
    • http://studiovalentini.eu/userfiles/files/fiwuwo.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c8e54570e---xisoja.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c8869528b86---mikozix.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d0b532682c8---dosekokafi.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/kumesawaxipigodebi.pdfIn PDF document text
    • http://cutyoursupport.com/userfiles/file/lawuvarifurojuma.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3bcc5e18748c0d0b85f94d4d99977c1b/wezabelalawotifu.pdfIn PDF document text
    • https://anglarill.net/userfiles/file/domidizisopuxugad.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/7e5c1fa8eb1ae338735de9957c1f1e4b/dutozuzatetulexawiga.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/3febecf98807821c4579aae2e5b8b9ff/kosolezapuxod.pdfIn PDF document text
    • https://grupo.iberia.es/js/ckfinder/userfiles/files/83539963495.pdfIn PDF document text
    • https://mmoxx.mn/userfiles/files/topasebilexurabemunuk.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c431f2595c---66259532837.pdfIn PDF document text
    • https://repare-ton-smartphone.com/userfiles/file/tufakite.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16074231b6c946---jopixavadakak.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/84060708073.pdfIn PDF document text
    • https://kawanmto.com/contents/files/11317153864.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160dda3d7eff60---tubutiwudetejedifibami.pdfIn PDF document text
    • http://redactron.com/userfiles/file/vigedifofufarinarivixu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=larsen+and+toubro+share+price+nsePDF 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_off0000e48b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA2 10760 bytes
SHA-256: 59bc945d6fa1b5cbf0a2b2f2088489049cb1813f861de439a27216f1cb9831a7
font_02_sfnt_off00011511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11511 18052 bytes
SHA-256: 76b0096eb24dfb160cccc74999c5f1187f5e50e104e3f11c121d4225508c946a

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