Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb32c52cbc68615c…

MALICIOUS

PDF

91.3 KB Created: 2021-07-02 08:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ed93c388e30f9188184f8ddf3a51976c SHA-1: 00eea1870f2f42171f3be4236c7e02d939541fac SHA-256: cb32c52cbc68615c34fe31721f43bb21ba0af721d5fe4c6a7d77923f8ee2615d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to potentially compromised websites, suggesting an attempt to redirect users to malicious content. The presence of multiple links on disposable hosting and the use of UTM parameters indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/9562359a9cb0fbb92dabe84d0ff6b3e6/lizisoxamugatadujaka.pdf In PDF document text
    • http://smflow.in/admin/uploads/file/90845320970.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a341837d22a---79975029666.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/fbritah14pmdurrjor8u2k3bku/luxunefufoxezegude.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/32fmblv7apsqm4e80od4tnf3lk/mudikedawuxi.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/ef48f62d362a3b6e35d626e56ae93e3c/najagod.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/vefapuxalavulugine.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/25abaefcb1227ee320fac54eda3f5036/nawuka.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/31978737104.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/43081814968.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/85605858598.pdfIn PDF document text
    • http://indecomavo.pl/inc/zufonilib.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b45179a240---juremalesosudami.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/8p851qdr83e5a8s4027195csn1/81586051515.pdfIn PDF document text
    • http://hjtech.org/admin/upfile/file/29286103959.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/2jsjiaep547r0vaucclemvh177/pujamen.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160811106030f4---vadogo.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d7a7b09ba---69358443550.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077518e28358---1199471024.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16074093dc5aa8---78851765610.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/fe8654bd997d89b49b6980aa5cfb42f6/44998938787.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=passover+first+seder+2021PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99A 16844 bytes
SHA-256: 40591f360bbddc39d689b866193413208f084ce0a158fa2a8c25080dcb42cad2
font_01_sfnt_off000101d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D9 10560 bytes
SHA-256: 53c9f79b14bdf6f99bb3bce1fb75daadf0a267335080fce39c2e6aea8de6b753
font_02_sfnt_off00011a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13248 17420 bytes
SHA-256: bf80c18bdec1422479729484b8a30eb1023f145f009a0ce13fc7bcf47b93597b

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