Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e058b6c0df1c93…

MALICIOUS

PDF

82.0 KB Created: 2021-07-28 04:34:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a857b72636cb0b3897d3a857c50b7d80 SHA-1: 38eef8a29ad348e87818fe1a7c8b6db4d38d9485 SHA-256: 07e058b6c0df1c93f647fdee3a7fdaa72f21bee9537941f2d7254dd5e23f082f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. Additionally, numerous external links are present, many pointing to compromised WordPress sites, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/794c1c3126265efb29e7c3af08b617f5/nimirudowoj.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160aa338fb6a87---54459412877.pdf
    • http://crackershrimp.com/file_media/file_image/file/pamegoniraref.pdf
    • http://librojuridico.com/aym_images/files/mojaruludevewezumokajule.pdf
    • http://bclgrouptt.com/userfiles/file/lulesumivux.pdf
    • http://ohmytour.kr/FileData/ckfinder/files/20210706_361C7D2007C9288F.pdf
    • http://amandamaitland.com/images/file/migetusivadekuregamonaje.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/e1ab815319d8b842dbcbc03a1672620a/43107937642.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782bb306df5---45233126131.pdf
    • http://cardealer-space.com/js/upload/files/42914397830.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/1dd68a44caf248491dc52cb7d5798c2a/27592715366.pdf
    • https://alihuata.com/userfiles/file/49854871480.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/2u2pk1kffag7fjec7gtf0vmtn3/5385447920.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/8f81e94737aacfe9d7056bd19dc735d1/zoloxedisuv.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca22c4f9b1---45960614010.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/c604f78c268e19b88efb8c53e0e1d6fb/20019078894.pdf
    • https://rendszergazda-cegeknek.hu/ckfinder/userfiles/files/gedezivetibebe.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/vcanlo7bvesl1e7o09gk6qqe9i/movarewafij.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/sq6dm7ec9cqp38isvt1qd7spl2/78252917865.pdf
    • http://angarakshaksecurity.com/userfiles/file/wojikunu.pdf
    • http://pincailight.com/zk/UploadFile/file/2021061522004673499.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a73bab5c0d6---donatisaxuvejiludelir.pdf
    • https://qualitymattressfactory.com/admin/userfiles/file/zewufojubazaparebajidatik.pdf
    • http://bafiti.com/sklep/userfiles/file/63085566954.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=prepositions+and+prepositional+phrases+exercises+with+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbd6.bin
d9ed315dfc5d771f7a0a771c07b4c438a6b532c58ba89f3b53fa8e17238380dc
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD6 17660 bytes
font_01_sfnt_off0001094c.bin
b5ad4efed6e128417f952d7a7299d6b3a2ad9d2af4fe1d2b7266fad9ce60332f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1094C 10800 bytes
font_02_sfnt_off0001222b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1222B 16792 bytes