Malicious PDF — malware analysis report

Static analysis result for SHA-256 035ae789f55105ea…

MALICIOUS

PDF

106.1 KB Created: 2021-09-06 20:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d08d612fd2ef4aa1ed99a97d7310abe6 SHA-1: a00dfc9e873bab504242cf5d2884521e926d39cb SHA-256: 035ae789f55105ea67674ecd967d196a2d43597114a685263f9e90a0777b2111
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a significant number of links, many of which point to compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the link farm structure suggest an attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9309

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://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3d172f2e3---zapuxuwapiposulakenib.pdf In PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/f29b075b5a6e5c5a7a389a94c582cca4/nepirifilenabi.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607de75040a2d---depitedonijubizipulovi.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/71549286327.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/58093063337.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/roduvekuweza.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132a2d3bf0c9---vufesiga.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/40gf3g5h9p20605u5vu85om2i7/zovejisajuvivakewa.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce30131da6a---94801198457.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160816134efcce---3313300234.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a24fa49b3---64128553459.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/ta14abuoihc1u2uii7faf80p93/weruromo.pdfIn PDF document text
    • http://campcolefamilyreunion.com/clients/82065/File/kerafusojuzaxokif.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/93a0d4c19e2cec9b52720f9eb718079b/84003598512.pdfIn PDF document text
    • https://conviviodihera.it/dati/upload/file/79485716977.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/zewepilowoxotefu.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/12030132950.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a43baa772aa---73220129497.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/tulejofidugi.pdfIn PDF document text
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/kefotigebupef.pdfIn PDF document text
    • https://cargobull.cz/res/file/xewemokip.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/234f87cf011c404f96070bf6185e6389/32411958787.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210828200005_pt7faj.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/fasiridejaxixonag.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/7248229446.pdfIn PDF document text
    • http://duhochoangthanh.com/upload/files/vewunijosememumanaxonu.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/papotogadigazuxageke.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/dd280a7ts4qg8thsk2uu9e52mu/92699108920.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=mettler+toledo+m200+user+manualPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A9 26512 bytes
SHA-256: 2158f82476edf5bcae77b9b3655ca3723337390fad9b6d2bc8d472ff2ff27b04
font_01_sfnt_off000148ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000160d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160D7 2264 bytes
SHA-256: 4e6a593d659857dfd9348948be75c33ed2abb4bc8ad13554d7594d9289eff008
font_03_sfnt_off00016aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AED 10652 bytes
SHA-256: 819820a078be8f9464bb5449ff600f8e46de52bf7bb7c826d8e108bcf659c0b6
font_04_sfnt_off00018368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18368 16164 bytes
SHA-256: a0f26d9ec2bc0bbc84dfb8c1a224a49f7f70479ac92e21d726acd811d43f3bd1

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