Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae7aa5922d82b6a…

MALICIOUS

PDF

126.2 KB Created: 2021-08-14 21:36:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 800c23421d75a1185c5982321ff320ed SHA-1: 26db8a93ed031f7728990b5fb570fe8249600b68 SHA-256: 2ae7aa5922d82b6adbbfac7604d5f9ab50ae50b441ef5942ae6759963d307bed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://timebymtm.com/upload/files/29061118422.pdf In PDF document text
    • http://suachuaspa.com/upload/images-content/files/65503218975.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/virisinigazofolirukulugat.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/4c50a15d01feed8ea4cd11ab46b83cbf/kenelisuro.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/timaposevolojexesom.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16098707db62d4---83862245684.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f1b9b3ae9deb5ce8165f168d13ed624e/53401628268.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/m87dafjppqn65cikr6t6mb8e2a/49754036380.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/wuzasinudazodumibasuroxul.pdfIn PDF document text
    • http://superlitefan.com/uploads/files/46086927964.pdfIn PDF document text
    • http://www.puhito.hu/uploads/xibarelalebunuruworidi.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c3237fae6---pasiredikenidiwep.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/65640345960.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16231120865428.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/4cfdda6b7d5f32d4ba0a7ec14f887b7d/zezelagosix.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd62b12649---60867882833.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e09ea93a2---gamanoroji.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/4bd87b85cb7fef6a39f2b57862288313/43761305539.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081075c77c1a---tokoko.pdfIn PDF document text
    • http://tochuchoinghi.org/files/gawejivejitojelakusasi.pdfIn PDF document text
    • https://ms01bet.net/contents//files/woludamuridekafedufexowez.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210709163823.pdfIn PDF document text
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/93949590327.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/32740082327.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=ashokan+farewell+jay+ungar+sheet+music+freePDF 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_off0001840b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1840B 11288 bytes
SHA-256: 5ec17fa15d05cfd16f18510cdcdc23a10cb35bcf98ed33d626b75982139a9aab
font_01_sfnt_off00019e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001b68f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B68F 19932 bytes
SHA-256: 713a0ec9a77c64d7d92b7a14c8cc9fa62370153e7cbb95faef2e08be66a18861