Malicious PDF — malware analysis report

Static analysis result for SHA-256 d075a3e491c6e6ba…

MALICIOUS

PDF

111.7 KB Created: 2021-06-29 07:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 470ece4478d0fb6d9c571ae875a2baaf SHA-1: 788882705b75d9762140ec09d890455d3d4d6998 SHA-256: d075a3e491c6e6babcfa28858d78bcaa015b99ae3a87d806a77619e463f78097
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads and disposable domains. The presence of numerous URLs, many pointing to PDF files, suggests an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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.
  • 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://dm288.com/slicice/file/kabijen.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16076f4c0d9e97---33008561369.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16090c623ea699---nuvogubojanakewamuvebozar.pdf
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/qnnmbiln0nc6h6hgujvd227a20/zuzesinigarezoj.pdf
    • http://shinies.ru/img/lib/file/98311186799.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773c217cf65---fiwatuxidawijoziwu.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/6qdrns4hv4h8q1ovuaj9slkq33/46965611517.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086067e20bb6---tozilovetom.pdf
    • http://yangpupark.com/uploadfile/files/76176062956.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/aae170bc79dfa2288dc3947fecdf809e/zokinokefibep.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607faf1409a53---fipaterapekekemufatozarag.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4808eafa1---55675561765.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/bctd0kl0pg84rck0gquu8bh39l/62678381273.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160811604ac198---67141063942.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5980962df---31603816789.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/18a256b01f9e3a6d6a07fc72dc0ff187/jojetevuverurev.pdf
    • http://jnafarms.com/clients/864068/File/ledajesikomamome.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16098113e05802---78786846293.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1157c7b15---fezoperan.pdf
    • http://polymer-optix.de/userfiles/file/73299601464.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/d1762276139f9c729a77d9d504c64a8b/sadojasebubijizokonak.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1374ade23---guzupomi.pdf
    • http://brlairport.com/images/file/nikejufakaz.pdf
    • https://hrmconsulting.biz/upload/files/53100142602.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=factors+affecting+capital+structure+notes
    • 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_off0001542e.bin
c251314163af0f7874bd54cdd8bef52401c30c83ee960b84c91b93a25b247594		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1542E 17068 bytes
font_01_sfnt_off00018036.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18036 16792 bytes
font_02_sfnt_off0001984d.bin
2d92699f4df9fffed579fc52b261058ffeee525943a7d1c2fba157bb8b0e44e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1984D 10732 bytes

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