Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32fa5bbc7e2f3aa…

MALICIOUS

PDF

179.1 KB Created: 2021-06-27 20:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0e396ec85b6bdf0b95c0993da310e9f9 SHA-1: 685b9642bd6f7cef2ac8b365ca8b153b6584d173 SHA-256: b32fa5bbc7e2f3aa4a3e15fd08de97a7f4bec161e7400d974ccc4c659115685c
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

Heuristics 6

  • 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.
  • 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://pistant.ru/uplcv?utm_term=dissociative+identity+disorder+and+autism PDF link annotation
    • http://debeleven.net/UserFiles/File/94860454573.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae029633d8a---72943400532.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/6524638980.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b92a3f21b96---67043458402.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084652f233ce---zexizitiribilogegemaf.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160947356b8653---28751078501.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//31993137884.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/3444c8922f81aab37f5f8bf7d99ecb58/lugaleworaradovudutegizut.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ab45da755ba54cd0386c58ef559d4102/lozopopow.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/dewugimexesorifevi.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/u27j770th6egdsm6mmquj93ho1/84169387908.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/vr9q98ueeotvnn3ij74al1aat2/kajagivobidosederuw.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acc8d7fd7b---zibivuzisil.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/bixabudoxi.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/94035015273.pdfIn PDF document text
    • http://ghioroiu.ro/sites/default/files/file/57185946088.pdfIn PDF document text
    • https://exporoaster.com/app/webroot/files/images/pages/files/vivaxu.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/futizedutojitikepap.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4001d777d---97900290142.pdfIn PDF document text
    • http://whewfamily.com/clients/12004/File/65289792282.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a57506b1790---72151766651.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/1e8aebaa3e7316e6ed7096e8f3e724c6/gagelopunufalokexawudeg.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/dbf4c45e99909cf5e7edf2fb663caa5e/kiwapikukeket.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/fc1d55795f6f3fd3be4e7d9737ec5f43/55500192772.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_off00025b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25B76 19468 bytes
SHA-256: c62ceb6d9039a0d353c657ca6c70c13395894e78ab4ca31242dc0ece2c88bf7b
font_01_sfnt_off00028d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28D89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002a5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A5A0 10764 bytes
SHA-256: df4915c427c916b44829159e7bd3adb7eed5355a6851f291e7963de7ea7752dc

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