Malicious PDF — malware analysis report

Static analysis result for SHA-256 490a207c4061e950…

MALICIOUS

PDF

82.5 KB Created: 2021-09-18 13:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a93cd6dccd1638f5ac2eb6ff648a0cba SHA-1: 40776e30eec3f0d29ccf8526d65d9ce923207140 SHA-256: 490a207c4061e95072c7d27ccb2bad0e94a904a8567d3ea5b24595d57e773347
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into downloading further payloads or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=data+counter+widget PDF link annotation
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16142a76241df7---23940947310.pdfIn PDF document text
    • http://jongauger.com/userfiles/file/xajugojobefulenovozesixu.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/16670129251.pdfIn PDF document text
    • https://vitanov.rs/files/2698209687.pdfIn PDF document text
    • https://mkart.it/uploads/file/rusopume.pdfIn PDF document text
    • http://m-s-g.ru/userfiles/files/wivugezebedazudolimug.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/fufosanuzixaponoputusupa.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16137a51adce24---medutelosu.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/56236406099.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161449f3ab7be9---vuwuwafiriluwo.pdfIn PDF document text
    • https://moiatakashta.com/userfiles/file/xakijirumo.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/favex.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wawujuki.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210913191025.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/ba40203f6dfe7daec57a5bf414f39c10/fisazoxor.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/1fdf939c7a749fe15a5a88eb8e7ed3c9/wapafaworowaxesejunirar.pdfIn PDF document text
    • http://agisinfo.ru/uploads/content/files/fobifugorisosowofiwemuzum.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/41248b4e34327b48a8baa5b8b5b541c6/xusiloranajifivinom.pdfIn PDF document text
    • http://architettipassarinmarzotto.com/userfiles/files/likanedavofibinilasu.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/lsu7a3unvadv003nh15l9ro6af/73493352388.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/lepelowutebabeluro.pdfIn PDF document text
    • https://dptech.vn/uploads/files/2013868765.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/181245138236.pdfIn PDF document text
    • http://alessandrotria.altervista.org/areap/ckfinder/userfiles/files/95462405830.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_off0000d945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD945 19320 bytes
SHA-256: bce55742050237e5587d5b5512573db2397d13b8af9fba515e5fb8e4efb02e99
font_01_sfnt_off00010c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C88 10516 bytes
SHA-256: 8bcbe911bc19fbb6330675ceb4f143b6c6247fdbe1759a4550be169bd476fb8b
font_02_sfnt_off00012476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12476 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.