Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ded746129422f38…

MALICIOUS

PDF

82.3 KB Created: 2021-08-29 05:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6bcd13e275d3590a2b01832b9b71a137 SHA-1: 89729066ffc057b6a1880849d1e35393b24df2b0 SHA-256: 8ded746129422f385dc04e88d82899e532821e995c83a61ee02a3cffc71fec3e
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a payment redirection lure, aiming to trick users into believing they need to update banking information. The numerous embedded URLs pointing to compromised CMS uploads and disposable hosting suggest an attempt to distribute malicious content or facilitate phishing. While no scripts were directly extracted, the PDF structure and heuristic firings strongly indicate a malicious intent to deceive users for financial gain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/h7sjah4sss649b6ugvsgalqq73/piwukomalotegoxupedon.pdf In PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b65672b5090---28064381503.pdfIn PDF document text
    • http://vaynhe.com/upload/files/42028506113.pdfIn PDF document text
    • http://bratislava.topenglish.sk/app/webroot/gallery/files/sazisubadoladetibad.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/28830924935.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f44be5b6c2c---66378794670.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/lelejarefavitusupi.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/22024703119.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/61eeb6417bb4856d114a79437ea6390f/88497558599.pdfIn PDF document text
    • https://skl.deindrukdemo.nl/upload/files/7297684454.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa18cb8d118---783862208.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/4235sir5rc0p1st653prk30pgq/30166901671.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/58478832239.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///kosuzikevibizobineneju.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c54a7baa58---rolin.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c750e20963b---tajopoxubirigi.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/02l9gq3aehfg35mub6cm851qv4/taromufavewixolo.pdfIn PDF document text
    • https://nusamulticentralestari.com/Uploads/userfiles/files/nixesorolisebozofigoxud.pdfIn PDF document text
    • http://aurora-c.jp/files/files/26658517957.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf19c0ca91d---zuretesip.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/xebeti.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1610f81e8438b3---mukubesepadikinod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=sensoy+and+diangelo+is+everyone+really+equalPDF 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_off0000d809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD809 10824 bytes
SHA-256: a2046153c5b12958d392139e12ea5fc1cd71cd1ca80b2a6ba36233bc4ca7bf79
font_01_sfnt_off0000f09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09A 18820 bytes
SHA-256: aeeffbb24ee3467a8a31c54bc5c5271d2f7db5b78701a4163bf7dc24808704dd
font_02_sfnt_off00012159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12159 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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