Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d82f6e478c1e18…

MALICIOUS

PDF

90.8 KB Created: 2021-08-01 13:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: e333eb02be53d1c0b126a9c4188489e9 SHA-1: 0c3bd5cb8af0e11b3013cbad9d9ced823621aa21 SHA-256: 26d82f6e478c1e18d39c77e58707da70193036eac1406c27a8b95bf675ecf7b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://crysiq.ru/uplcv?utm_term=bollinger+on+bollinger+bands+amazon PDF link annotation
    • http://burmeseburmilla-allevamento.com/userfiles/files/pemazo.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/gabewulovigojivivub.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607936986d72b---84606537837.pdfIn PDF document text
    • https://davaocarrental.com/images/file/83504142086.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160ac769208d3d---xoxemafakabamupafaki.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/62531845716.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/3acec831fe956c2e0e5f6b4ee8fc70ce/90017978201.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4ffc3e1f1---wasozeguviwokefatatupine.pdfIn PDF document text
    • http://guidesdugrandlarge.fr/images/import/file/ravulotibexo.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7b1bcd649---86742654312.pdfIn PDF document text
    • http://gdaniec.com/upload/files/wewupebixademeziw.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/torimanenusodikaj.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/pvbbc6jq98ajkh4bacm5innr77/25067773697.pdfIn PDF document text
    • http://best-label.com/upload/files/31578477506.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb8940ec0f---fuliwaxesuluvidojawuveja.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/sogudekaketunetuxupavopas.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/xegudebupiwujof.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/sghqmshd46j299n8h72qoup46o/51281309490.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbcad153b50---jenilifilonasusadodudila.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/12388899157.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/92407557676.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16085027775e3f---fetazolid.pdfIn PDF document text
    • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/jigaferewu.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160941ac3984e9---bekawurivezoto.pdfIn PDF document text
    • http://bowlinggreenhsclassof66.com/clients/b/bd/bdf8ab256cd88a603fc2b95a051c5839/File/fofonevo.pdfIn PDF document text
    • https://hoalavender.net/upload/files/71971798039.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1A 18352 bytes
SHA-256: 1ef1ebd81a89c39c6477c25497f23ede3214ef7888351fc6dbd347aa89b535c7
font_01_sfnt_off00012c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001446f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1446F 10748 bytes
SHA-256: e65b3634f5b7df93f48b5709542a5be22012cb84fd849c2c61f2d8f7558d2500