Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b03d9470ba24f3f…

MALICIOUS

PDF

72.5 KB Created: 2021-08-01 06:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 91993c6fae51b84d70742ee887c6d23e SHA-1: 8a6c54dba06d8ad003aa5008d48f8211158bb038 SHA-256: 0b03d9470ba24f3f2fc7c4c7a9ed23310f1bc246135849e0bb587541e5c7c13b
156 Risk Score

Malware Insights

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

The PDF document contains numerous links pointing to compromised websites, indicating a phishing or malware distribution scheme. The presence of 'utm_term=js+import+json+file+html' in one URL suggests an attempt to lure users with technical-sounding keywords. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://cructi.ru/uplcv?utm_term=js+import+json+file+html PDF link annotation
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b9d892388---pivofukivufowatijagakibu.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/46537513102.pdfIn PDF document text
    • https://smartcrm.cloud/upload/files/guxorozabulumegafasexat.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/kqo7m9bckhfbt65hmf51ail6hu/57462936193.pdfIn PDF document text
    • http://phannhan.vn/files/usersfiles/files/tapetikivekemo.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/78992632889.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/974c9a6c294fc825cb40ab88fd5da5af/57634932924.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074cb4daa043---kalososutimagofo.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/cf31e6c313c8fe734fe26a4764c45b04/jobesegewevavezire.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/11654361081.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/660050bb29b1547e45095ab2f0ab1d3a/pitupegejifanolawele.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/majovokatefaze.pdfIn PDF document text
    • https://serka.com/serka/upload/files/jazuluvaj.pdfIn PDF document text
    • https://henklinders.nl/henklinders/upload/files/pezaleti.pdfIn PDF document text
    • http://cogersquest.com/clients/f/f6/f6194b381802d71b6842d6160e8859b1/File/delag.pdfIn PDF document text
    • http://ristoranteyuri2.com/userfiles/file/4514523208.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc29833872---92959332404.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cbce33ab109bccd8fba13abd65e08ff7/85814749983.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/kigen.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/66699278054.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/ji4v16gb8pc3ng66cnd87vt5so/36979972532.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/8397003039.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/6qtadt92ve6j54so9pk6v8vbfc/72628520334.pdfIn PDF document text
    • https://martabaktelor.com/contents//files/vatifofazapaloga.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_off0000bbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE6 15364 bytes
SHA-256: e9708ca021441b3eccd482ebfbc53189897161429d2469f055a2192e9d34d4da
font_01_sfnt_off0000e378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE378 10584 bytes
SHA-256: 516b2558c6f23aba028f5f9bd6e4c6d3e54ed6dc9620a76837c43a41890f6f0a
font_02_sfnt_off0000fb5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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