Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd4d9da5b0279ed…

MALICIOUS

PDF

98.7 KB Created: 2021-08-03 04:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a02f36928090a391d1094f03a7fa1459 SHA-1: deb60ef2021e4575d9ecf43723ce7df6004c2ea4 SHA-256: bfd4d9da5b0279ed041d0b3907c50ef5ee8fff245d06018d9cd1708656df4269
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised websites or disposable hosting, indicating a link farm for malicious redirection. ML and ClamAV detections confirm its malicious nature, classifying it as a phishing trojan. While no scripts were directly extracted, the PDF structure and link farm behavior suggest it's used to drive traffic to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://drafthe.ru/uplcv?utm_term=como+calcular+medidas+de+un+triangulo+rectangulo PDF link annotation
    • https://branchennachweis.eu/userfiles/file/wedexixifamogipopulikupa.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/tuvapupowagurutolalipoxi.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/nosoninivafevupalel.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883625dd4a4---lavedisobetot.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/33438063198.pdfIn PDF document text
    • http://viethanit.vn/hinhanh/file/xegobosoxusewoporupikixov.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/tuvoguxutoxamitu.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/82351050273.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2ed091884---90460368713.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/vuvakogilusenozawigo.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/2000ee4c44682dc3a9e18334fe6c94c5/66322739318.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/zoxutegerepixo.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607734f3e1292---xegegudevu.pdfIn PDF document text
    • http://www.recko.ru/ckfinder/userfiles/files/zunapopisulamofekinagi.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/8474636973.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210624_4AD63E63B1EF2C73.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/moxuku.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/suroban.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/xixonuvaxupodonetudus.pdfIn PDF document text
    • http://orikon.net/Images_upload/files/pegowivipul.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/64a6017ca50727649f072d0e0d68ac82/27258290509.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/15c1a33c1eac22886903ba067f4f67e1/pelamesoxo.pdfIn PDF document text
    • https://dbmotorbrokers.com/userfiles/file/dazuwedugajidi.pdfIn PDF document text
    • https://agermag.ro/mm/file/99463036082.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_off000114ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AD 20056 bytes
SHA-256: 347ac76a67d050140364294e57e8be3fe26be75cae7e196964a1aa4658b9de00
font_01_sfnt_off00014927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14927 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001613e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1613E 10844 bytes
SHA-256: 8430850c93878ad29194a4c2f4c121b1150d29f4750ff9a40a58ee6557aef45f

Open this report in the interactive analyzer, or submit your own file for analysis.