Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e7b6fe04fd30d9…

MALICIOUS

PDF

84.4 KB Created: 2021-08-12 12:34:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 10f9e800ee0c2f1abcc5f09d93023777 SHA-1: ac611f554b6361c25911ed0e98303542310fd6cf SHA-256: 54e7b6fe04fd30d9d84f84fe26865ee673f3f93bc5a0f054222b72c2236ed561
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, with several pointing to compromised WordPress upload directories, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://santevita-bg.com/ckfinder/userfiles/files/3752178979.pdf In PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b240ed5f9d---11541313361.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c18d2540e8---xefeviwuxifavakiw.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/47257932056.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d223a91e1d2---luzaxejigawupos.pdfIn PDF document text
    • http://195exim.com/datas/files/51481855611.pdfIn PDF document text
    • http://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/60005475336.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/58c11a60e374a3a339ffafe3122769d9/japap.pdfIn PDF document text
    • https://paperland.bg/uploads/file/72015709978.pdfIn PDF document text
    • http://keitbg.com/images/files/89524354993.pdfIn PDF document text
    • http://dentherapia.hu/files/file/zumusobofajodiri.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/resulux.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/6634c06a65e6d749528d14bd90f92c6f/berovebe.pdfIn PDF document text
    • http://biomehl.com/images/content/files/muduzulolovimano.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/rimepuvozemonanepozusuke.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/82978d9b61756c1ddd565f6bbed22218/76121255506.pdfIn PDF document text
    • http://kxzyjy.com/CKEdit/upload/files/sajalugegemodifaj.pdfIn PDF document text
    • https://silky.ae/images/bulk_images/files/35130927188.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/gebipawivakarepavuvu.pdfIn PDF document text
    • http://mmckno2010.zkosuchdol.info/files/56796990667.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=como+hacer+figuras+con+globos+largos+paso+a+pasoPDF 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_off0000e36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36F 18056 bytes
SHA-256: 727acefe1214750cd4ac30be58af2049d67cbdaf4f2e3fe667520ee2b73ae7cc
font_01_sfnt_off00011073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11073 11100 bytes
SHA-256: a99c1dfbaf2e0c9adce34edeb9ac14d82246ab221d1a8711dc480603b574d0cf
font_02_sfnt_off000129ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1