Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff7a2bc0ea2e1320…

MALICIOUS

PDF

74.6 KB Created: 2021-09-04 15:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8a429a7e5676ecaea0a769fb10b943f1 SHA-1: 8be237be2fe0107bef765e21f1e1d3c8c09d17e7 SHA-256: ff7a2bc0ea2e13207b4af0761814f3f39ee00079719bd27f332de3ccdf1625c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The PDF structure and embedded links indicate a link farm attack pattern, likely intended to distribute further malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/3fee1a41684973163bf3d63de3514865/31204097888.pdf In PDF document text
    • https://africanresearchcenter.com/userfiles/file/33752128663.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/1619871577465.pdfIn PDF document text
    • http://iswii.net/ckfinder/userfiles/files/nikodabe.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/cc93f0f786c9a5f658a18376996d8a75/navivowujuvalikojobaz.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872faa1904f---47998012149.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/39194417918.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607c75f27dbde---2013400140.pdfIn PDF document text
    • https://eyescare.vn/app/webroot/upload/ckfinder/files/94843595642.pdfIn PDF document text
    • https://topupdana.com/contents/files/69901242349.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/93820215987.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ff839125d---lunitidexupovibez.pdfIn PDF document text
    • http://come2menorca.com/images/file/65122426694.pdfIn PDF document text
    • http://di-tech.kr/fckeditor/userfiles/file/zunaramobilewamuka.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/wixarerorima.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/befadizinupojiwipifojowop.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/jabapisejakiwixoka.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/lumaxafid.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/eiff9uas879ibe0kl99sjjt5nm/96630946874.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/79382763722.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/50c526a3bc4d306ff91cb364024b61ad/luratixufogix.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/zizetuzemazipetugufas.pdfIn PDF document text
    • https://newshieldinsurance.com/demo/gsa/final/images/file/wutuboruwusemolaviwotam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=vicious+cycle+worksheetPDF 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_off0000c0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C2 16880 bytes
SHA-256: 81183468045fc4affeb325be654a1531d144fa737dba8c0c8ea56094a995e60a
font_01_sfnt_off0000ecab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAB 10424 bytes
SHA-256: f359dcde6067fad9bc88195cc46c2bb81a3006a13693da03152b430bbeaece03
font_02_sfnt_off00010493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10493 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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