Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63aa589d7f42863…

MALICIOUS

PDF

128.5 KB Created: 2021-06-10 20:34:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: de64a698e66541cd75fd086f82698587 SHA-1: 8abf5fa70afd01d91c8be79f5eddc21205abf27e SHA-256: d63aa589d7f4286324de63817e4c418a26720cf375213fbb9ef18d390c06bc43
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links pointing to compromised WordPress sites, likely intended to host and distribute malicious payloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicate a pattern of using compromised CMS uploads for hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://medvor.ru/uplcv?utm_term=ragdoll+engine+script+download PDF link annotation
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f4ba9b56c---totadivujawagoxalofavin.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/95196815273.pdfIn PDF document text
    • http://atomleasing.ru/media/File/kemuwuxu.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a9adce3e807---gizuvoxenufinarelumizo.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/d2342ea8e71aaa5716359c25522c9d8c/latela.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b99e71a63---jadivewokifaruvajuk.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/chrkarqbnu0svkqq79l8nonnhu/67209826261.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6064b800c---53049620123.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68b45361b3---puxupexesu.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/2d0eor80el4efkfbkd3sjbkn25/bejavu.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bee72d5bff---verikobevavitezunuva.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac54732300a---buxujavelelememixu.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/9bqab8h156filps5p2vjc9tk32/naxipolomaf.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/3a12d773cf701e0fb657f024a5539411/67553409302.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3ad880a3d---jakejotopujeg.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b84dafe247f---76698988843.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16098ad729fabd---putinetufej.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160700ba8f35bd---xokiwobep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E80 7988 bytes
SHA-256: 1e4d96814fae4b4ac7beaff2d05480eefcc88e99447de180003e795870a43b97
font_01_sfnt_off00018893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18893 5340 bytes
SHA-256: ae032a0f176ae0b43bf216966057cd5c44876ad30c99cdbac698238eff6e377f
font_02_sfnt_off00019adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19ADF 2896 bytes
SHA-256: c7687ba71e576c17f6a3cd3d88026780e9787beec3651e1e6718b98e7f339205
font_03_sfnt_off0001a6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6F2 17824 bytes
SHA-256: a29ed148aad747c99e975d6b7a7f5f948f035cf92a11c8ec69f95344c7bb616c
font_04_sfnt_off0001da1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DA1A 17272 bytes
SHA-256: daa4e2c3350174862875c2382dbdd09a501881aa7dc5204187f02a0e49d197b4

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