Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d0aa5a7bd60c277…

MALICIOUS

PDF

82.7 KB Created: 2021-09-08 00:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5692ae60e0720c8e4572ba925c888302 SHA-1: 6a1878654e3d071f6ecd60bb4b40534b01a73d4d SHA-256: 5d0aa5a7bd60c277c8e6595a957952d513e62d1eda702885e5472df4e60fe912
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple domains, many of which appear to be hosted on compromised WordPress sites. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests an attempt to redirect the user to malicious content. No scripts were extracted, but the structure and URL patterns are consistent with a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c3102a18a---namilekin.pdf In PDF document text
    • https://cuichi177.com/uploads//files/202108080635328562.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/zajekugoxupoxu.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95056747975.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/faab9d5f8e662099429e08eb09fd9fae/joked.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16103df0641f76---1389118317.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/46583365665.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075357b352dd---budilerufikemexato.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/82642228196.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607593c6aaef8---49571151743.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16095c8cbdcb81---zorafixubitiwerodewulani.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/dufesebawiwapajo.pdfIn PDF document text
    • http://sevoir.hu/uploads/file/gunezerolujaxugoboxiteg.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c668d34c4bf---89353598441.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160731d41ce281.pdfIn PDF document text
    • https://henklinders.nl/henklinders/upload/files/54680814478.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/48bab189aedc29a5fe56eda24c58d86c/69665570135.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/95314570050.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/1ntvk9vjf62hel453rmofrbfof/vixekibale.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/sevazokisiwusop.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/7a677e0062499ca2962257a12eed15cb/liwus.pdfIn PDF document text
    • http://eastcity.hu/ufiles/file/47984340362.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/boroxiratafavower.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=tipo+de+cambio+concepto+pdfPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/77191189834.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_off0000dc22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC22 10568 bytes
SHA-256: 00e097a75d4bb32269052e7190f9069d4e72d79e8dacce811c2068d0b1f0f63a
font_01_sfnt_off0000f404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF404 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C16 19380 bytes
SHA-256: 2696faa787e3365b523cc42c958449ceefc94b0d91519f9b3a1750c8367d3e2f

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