Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd13bf756e9638bd…

MALICIOUS

PDF

90.2 KB Created: 2021-07-05 05:34:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8fca2db1d3e706d16d6171c88e030093 SHA-1: 54a8c25d79f93ce245108eceefd341d6bc00e958 SHA-256: bd13bf756e9638bd7c2d5c3cd9daf6aaf7fdb77e2bff8ec721639dcb582acd22
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF sample was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites that host further PDF files. These secondary PDFs are likely designed to lure users into phishing scams or to download additional malware. The presence of multiple compromised CMS upload links indicates a pattern of leveraging vulnerable websites for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160705818df5c3---44861778123.pdf In PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/319f5af69de2c87e63d27de5c8bc78fa/kotasuvagamexanek.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/ed13ae968e5f14b1114cfd546c144d9d/riguzagereposojik.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/mimanefisu.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16091d849a54f3---revemizalu.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609064465b419---76170512284.pdfIn PDF document text
    • https://lecapsuledigian.it/file/74519431093.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607856e754426---xobowejoruwu.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/7be5b865843cfa8ce224606f5f7a0e01/89941669822.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/butafikapuximumomexoxar.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/fobozigamozagidogizoromi.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/95092605524.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0113747001622857918.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/4kgujmcut3bns6m30mdmivcfkq/59150435880.pdfIn PDF document text
    • https://horizontire.com/userfiles/file/lufifuginuk.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c06592c5e0a---sedowujuzudetosokox.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/d618e6e49e6894ea725076bb6d5e82b9/86271082769.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f39c788b78---puwolatofegaga.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/97ad5a3532117b646fc165b557ac0529/95046515437.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/vixil.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/k09kmp2t335ve3eou69bumgoa6/25523258013.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/htu2je0kk1uhhgfv0v19dp7j5u/fuxovutopifudelowaj.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609403dbdbf58---fejenomikolufarad.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/59sh75e27armfsounce50keo9d/muwupojakobaxatupuwe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=severe+belching+after+eatingPDF 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_off0000fdd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD6 10608 bytes
SHA-256: f1ba401641954a5abf13add280d39d55b8082400e2af19b8f1b4fba90bfb1543
font_01_sfnt_off0001160f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160F 16920 bytes
SHA-256: b42cb6032bae2839ec441c4f85e5d66a93b0b224d83d652f4d51146487433d80
font_02_sfnt_off0001421f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1421F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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