Malicious PDF — malware analysis report

Static analysis result for SHA-256 84edf10f32092075…

MALICIOUS

PDF

82.4 KB Created: 2021-08-07 03:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e9ac0e26b368bcaf5b080afb9b23a6be SHA-1: 72742da252a2faebb7896ba3556e2c652fe1c47b SHA-256: 84edf10f32092075e3a9df2c00ef8d9d56db1a2a2702e09bf402b32aca493846
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm pointing to multiple compromised websites, a common tactic for phishing and scams. The heuristic 'SE_PAYMENT_REDIRECT_LURE' specifically indicates that the document describes new or changed bank instructions, a high-value business-email-compromise pattern. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/7dc25fe704d586fb1ed7b95cbca134bf/sakarajofon.pdf In PDF document text
    • http://casier-a-bouteilles.fr/file/79976251391.pdfIn PDF document text
    • http://tiszaladany.hu/upload/file/49397003034.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160949052742ec---9768694280.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/3996936516.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/83468109219.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a27bd87f09f---sejawelikitoz.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/b1d2947b0f132233af8a6f6e649164a9/99016395020.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/a0ef6a794409de746edf6e307aab390f/53182468505.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/59992433230.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610a13197cc4a---vosugetexepakewuvizazadon.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f45f665ef6---tesapumab.pdfIn PDF document text
    • https://filetorme.com/upload/files/fularomipepuporikaw.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/5621827601.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/negawoximojugem.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/kidegonujebuzet.pdfIn PDF document text
    • http://crackershrimp.com/file_media/file_image/file/gototexadotixuvevivo.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e858e3d7f59---sajugisifu.pdfIn PDF document text
    • http://shield-in.com/userfiles/files/75487365640.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fa841726a4a---85134413152.pdfIn PDF document text
    • https://bamor.org/userfiles/file/63334640423.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/a315f45a8951cc4a7af9260089a02e96/46104095348.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/didipodapewegilelip.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/uf3nr8177uq1297u1gulqa9c86/43122203125.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/4549b208c0db18807949ce43a5fcb3c6/kelazigodegamimevibeve.pdfIn PDF document text
    • https://advik.net/userfiles/file/94141135072.pdfIn PDF document text
    • http://devison-matras.com/upload/file/54766212737.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=cheats+boom+beach+androidPDF 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_off0000ddc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D3 17220 bytes
SHA-256: a28e3ac840eb41aad3c00e99bc14423abc9c157f7de7be56d4f8f909ed760593
font_02_sfnt_off000121f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F7 10760 bytes
SHA-256: 9bfbef397357fed8daa78f0aa67498570d26231d9fcd9ba50dcb8f8d9c9ec349