Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e14f3a8b682e2d…

MALICIOUS

PDF

90.1 KB Created: 2021-09-03 04:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 98f8456fb69988ded713a20ecf238e04 SHA-1: bf8b1bc793926de07ce61f0d3bcba69047d99fae SHA-256: 54e14f3a8b682e2deeb4943953d29d86d12ca7737e55978805912718057c1618
156 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous embedded URLs pointing to external sites, many of which are hosted on compromised WordPress installations or disposable hosting. These links are likely used to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://philabc.ru/uplcv?utm_term=%D8%A7%D9%84%D8%AC%D9%85%D9%87%D9%88%D8%B1%D9%8A%D8%A9+%D8%A7%D9%84%D9%81%D8%B1%D9%86%D8%B3%D9%8A%D8%A9+%D8%A7%D9%84%D8%AB%D8%A7%D9%84%D8%AB%D8%A9+pdf PDF link annotation
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c54663cc4f---20286785146.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/farimipikariwutas.pdfIn PDF document text
    • http://thrifthelp.com/flash/thrifthelp.com/file/26886828272.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/84820732890.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/40466683289.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/19696931656.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/58439121357.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/fasavazawazunerewukil.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/451275d54d1f6a7b07e067372fd24f82/19002847892.pdfIn PDF document text
    • http://solarexperte.ch/fckeditor/editor/images/file/68087706261.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/slt3ok0il773k34p2e1fpkn81a/90544348780.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161031a1255dde---keziriruzo.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16126f7566b0c6---vekufobedojupasolofu.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/gusix.pdfIn PDF document text
    • http://mkngsp.ru/upload/files/xalilabud.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a61d43762a6---gofuxezes.pdfIn PDF document text
    • http://sysquare.com/UserFiles/files/porumezutit.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/418c353a3a661ba2bdd89b015246749e/76066173203.pdfIn PDF document text
    • http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/furibevajew.pdfIn PDF document text
    • http://cityfate.com/files/files/51374936665.pdfIn PDF document text
    • https://zbmbudomont.pl/userfiles/file/12670280259.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609418a8a1267---52231208277.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000fd05.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFD05 24256 bytes
SHA-256: e0ca1a7cd54309c2ffb85025e2b4afb755a24cc3a7f5faaefad789cbfba71039
font_00_sfnt_off0000caff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFF 9372 bytes
SHA-256: ab692011bb810b4091e5b6863c1468cc19624005727076e0e42723678ec61724
font_01_sfnt_off0000dee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE2 18616 bytes
SHA-256: 3d04d66255934a8c2cd51ac9b6d0d59a7c6b07d67e2df535438425725a2155d0
font_03_sfnt_off00012704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12704 19400 bytes
SHA-256: ce353c1846364496bd87ad5fe842c798f01071bcbf5a7bb26638ec2b52c29814

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