Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddbc41aa12a7eeff…

MALICIOUS

PDF

88.0 KB Created: 2021-07-24 17:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 29ec7411f70989fb99de7c84dc533126 SHA-1: d8ab73416c1dd532db39cc4f532e59fbd6bcb2c2 SHA-256: ddbc41aa12a7eeffb324b70fc58843f37ba9657905232b0f127b2279538a8fbc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting an attempt to host malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://theclubburger.com/uploads/files/lakesotowutitipavedoto.pdf In PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085c3d05e391---74946041976.pdfIn PDF document text
    • http://immopolignano.lu/images/runuz.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdc0120077---vibudaw.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5640db9358---jaseloliwug.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/33bb7acb81c58e4db82253d3464ed125/juzolokab.pdfIn PDF document text
    • https://nanosoft.mn/images/content/File/misuka.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/2b6e72ca950f69261b0b0bc681bfcbb3/totanejizojobemesojise.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/41354843624.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/j2e1ob1vg5n6t8dk50qqjntocv/jikamoxawazekov.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/89celbg085bjck46ap1c8i1tkv/firimiseribabuwexanilirab.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf8643f2be---32708577261.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e840b6c4fb3---83450915109.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/ziwojaduwisaxugazipufopiv.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085dff2295a3---93966419174.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/88303919825.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f278110ecc---30885363575.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/96707734331.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/9840424852.pdfIn PDF document text
    • http://sooclose.eu/upload/File/remifetedubarokafo.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160774e78ec086---73787253549.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=wonderword+puzzle+books+by+david+ouelletPDF 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_off0000f1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F6 17564 bytes
SHA-256: 9f89ab7ee99e1ba0eeee52fc2c6168e12b1f55168f92a61d25e8020a8ba6c26b
font_02_sfnt_off000137b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137B0 11036 bytes
SHA-256: 478f591581ecbb39cdb29b58573cbe1104016f0b4156d8e6088a33001a92fc96

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