Malicious PDF — malware analysis report

Static analysis result for SHA-256 1452179acbb5e20f…

MALICIOUS

PDF

90.8 KB Created: 2021-07-30 17:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: cc224edc6f7782617ecea00762e0aca2 SHA-1: bcdd00934b4872f9a10cc7eb0c86ec101e3af73d SHA-256: 1452179acbb5e20f5e263e636dfa8c0f3f26a49da84b8a4dd8ead34e89685a17
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or SEO poisoning attack. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://irlanc.ru/uplcv?utm_term=iceberg+theory+hemingway+definition PDF link annotation
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/21j4oocn1cbnc3ashbugv7gs6b/tajoretomeravi.pdfIn PDF document text
    • https://iva-vietnam.com/userfiles/file/xizezavimopodonop.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/e1523e7fmks945i8eua9njn6m5/sedutopezuzujadezorolone.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/85219418172.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/97378859572.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/21011048518.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/695fc5a6f7289775011d15049d2951c0/10424687540.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021051721564216.pdfIn PDF document text
    • http://holycrossyouthministryasp.org/clients/f/fa/fa15eac34f6f8ef5a8ada011ffef1578/File/24464585422.pdfIn PDF document text
    • https://sambelteri.com/contents//files/48674812169.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd776ad3d2---wixenemeluzelop.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/14379457074.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/zufose.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/gunujisisaburapunu.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/afda242c439abf78714ddfc530701a60/21978874288.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810aad3192e---57104651293.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/77267417803.pdfIn PDF document text
    • http://rwdwebwebdesign.com/img-aim/files/xisimug.pdfIn PDF document text
    • https://kaisar168.com/contents//files/dagij.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/wimenewadowabirapikotasis.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609193072055a---69416149239.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/56c51bbd3a3b8e3f8e5aef657740b237/gosevokogamadilobib.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_off0000ffca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCA 11000 bytes
SHA-256: 82f6463396e48d930928840172e9f6ad5ad960a0ece020b0a48651af50447adb
font_01_sfnt_off0001190a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190A 16848 bytes
SHA-256: ddaaf85dc87c0f1a9d83f3debe5a2ab9ef85bcbd432d51662400d7686a850b8f
font_02_sfnt_off00014506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14506 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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