Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b884a96bba92f9…

MALICIOUS

PDF

86.6 KB Created: 2021-07-01 23:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: b45d7eb9b5a054d12d69b7b4aed1023c SHA-1: 7b21a8cb232745cbb8ef8e9b16016147b2d287bf SHA-256: 57b884a96bba92f9e23eb0293bf2a1a7eb8683687d319bab43d2945d0aa757b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting it functions as a link farm. The embedded URLs and the nature of the heuristics indicate a phishing or SEO manipulation attack pattern, likely intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://rencontres-icare.org/userfiles/file/nasukatemotosa.pdf In PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/1e2f3cc067a40cc1c646ab14b9f98a68/fuxalosovizetejon.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/kezomidilarivovaseden.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/zerukov.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/53uqrjrb0v8gebnajjddim0jnf/neninegogomukol.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ff403f29f---lagafivifolujawa.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd3d52f840---17470997113.pdfIn PDF document text
    • https://sce.tw/uploads/files/60cb02ddbdbdc.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/415526c3c6c9c900aaa6aecf82aca9fd/lawovezulotef.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/lidamifijotugosizo.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/f279378a49959a349e4743c757404fd2/voxuzelegejimepekenadagud.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160bbabdf68002---15494697018.pdfIn PDF document text
    • https://horizontire.com/userfiles/file/peralakalobododegunekot.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58a25e2e3c---92297232214.pdfIn PDF document text
    • https://prosperitas.be/data/assets/file/xuwasowirebitenutufabira.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/tovobukonavateresiref.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/makezojinavejerinalaj.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080591d05925---nokigarusifosogiditizeje.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/sm6erfpiljtodvq49ntk5ak88f/21772859886.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/f41ee2e64f2068576ca80f1dfbff044d/51626071680.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608d06f77d7a5---jufonazijefamowixulepadum.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccae8627af---bivebugilijitulurugoro.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/21854063407.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=short+guided+meditation+script+for+anxietyPDF 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_off0000ee6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001067f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067F 17064 bytes
SHA-256: a26e7c44ceccf925881494ab040d0a7d872ade2180e9ddc1c550975d23364c9e
font_02_sfnt_off00013214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13214 11412 bytes
SHA-256: d67de6dfa4a24dd9ba7c01bfafa41ad7a4b19649fb0cdf397ab9d6ecc1091d49

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