Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a9a159e4eec306…

MALICIOUS

PDF

70.4 KB Created: 2021-10-01 00:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: be48335b9d39ec5fe94777246ad3bbc0 SHA-1: 4e69c3a6a9595d6436f79489bb892f4631535b51 SHA-256: d5a9a159e4eec306e58b7bff279a0c7b74b2f3a57fde069b32d1c330fc2f7000
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 6

  • 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.
  • 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://www.firstpages.eu/app/webroot/files/userfiles/files/bisetadimavepejitiwad.pdf In PDF document text
    • https://taksis.lv/taksis/userfiles/file/85699278464.pdfIn PDF document text
    • http://aurora-c.jp/files/files/51849173085.pdfIn PDF document text
    • http://parquet-cortes.fr/data/Files/92498712382.pdfIn PDF document text
    • https://mallncart.com/userfiles/files/45571449162.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/s9n3ph8vaa49d6e3943buhl52o/nisavemiwedorilosaxokobup.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/tonovuz.pdfIn PDF document text
    • https://dafelia.com/files/dixaweretuvegoxapeliv.pdfIn PDF document text
    • https://96662888.com/editor_upload/file/xupaxosologetunozazol.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210930191352161186182.pdfIn PDF document text
    • https://scalping.ir/data/files/file/sumajojavezajosib.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/pizijarevojeratirojil.pdfIn PDF document text
    • http://kzlo.pl/fotki/fotki/file/97286806346.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210905_B085640C25510157.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/83550905345.pdfIn PDF document text
    • http://beta-rc.com/upload/files/jufulojugefaxuziwufaz.pdfIn PDF document text
    • http://hajnysport.cz/FCK_userfiles/file/tezitefageze.pdfIn PDF document text
    • http://e-junghan.com/userData/board/file/3284021777.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/jcugbg8rmled62pjrcb53r2jn1/67342986937.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/fuwunava.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/57211471557.pdfIn PDF document text
    • http://nensi.si/upload/file/faletogemadubalekofivo.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/49768003185.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/19399775444.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613834052d5e5---lerujux.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/i2jsdgampie1t9mohg1mu21tbu/gugejaxazuxo.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/28205690051.pdfIn PDF document text
    • https://bfull.ru/uploads/files/26452624355.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=is+save+the+world+free+fortnitePDF 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_off0000b77a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB77A 10552 bytes
SHA-256: 8ed511175e2f01a9559f8612a46d86a165608dccf1976a1a270df81fb0b42786
font_01_sfnt_off0000cf8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8A 14456 bytes
SHA-256: 2293c68a7d9c3d28bb0a2b3575821bdf5106da6ba1062c688bb68d01aae0dd0e
font_02_sfnt_off0000f31e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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