Malicious PDF — malware analysis report

Static analysis result for SHA-256 be2fd6fb5496d762…

MALICIOUS

PDF

76.5 KB Created: 2021-06-26 01:06:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 6d3d1a8766ec92f8df530a00a304691d SHA-1: 658834ec5f226f4f580faeafe3f119a8035e1a6a SHA-256: be2fd6fb5496d7627881eceb8c7ffd7ed7f93b5281f95f122d3d342824b9c981
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to compromised WordPress sites and disposable hosting, indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDFs designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://wastran.ru/uplcv?utm_term=nissan+350z+manual+for+sale+near+me PDF link annotation
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/8io575dosrncf8k72ffj9vpqv4/xasezuzikedibare.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/6gddiebslmq30mp4g1ornem603/juvasozinebexa.pdfIn PDF document text
    • https://xistenze.com/files/files/39384791651.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0b3cc7a31---megixim.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/26644035733.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/vivixalezivujipobofas.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/e985992b3115a54c3cda252f23e63e70/wipejelefalajefexubun.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/18219185704.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8de3116a6---jatadatigazimujijejido.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/11bbd42d8e6772999a51839db2d72c72/begijukelobenanosekad.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/8c05e5f234e3ac60999742331d8962ea/bitinurizapunes.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/dhc5u57h158o3f32s94i8t9fl3/gutavamivulejeves.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16201765499265.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/55049379665.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/55004751148.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/1afa17920d14bb4f25e77611d277e498/dokuvofivamubavini.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d74a70d203---63956521973.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/0kduc34uvubftisco8mgrejnot/88113264017.pdfIn PDF document text
    • http://bkbflooringusa.com/userfile/abbey/file/lukejemaxaw.pdfIn PDF document text
    • https://2acontractor.it/images/file/99315766977.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/35196884593.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95f047a489---suwilewuxemosototugatule.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_off0000c844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC844 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05B 10844 bytes
SHA-256: 98d06c3f759147f6b2fc8dad1037566b5e2f445facc45cb07d52b1e36310ae32
font_02_sfnt_off0000f967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF967 16612 bytes
SHA-256: f61361de21debd7d39a645b5558eac7df670e9cc1511dbc622082f5e1a824b41

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