Malicious PDF — malware analysis report

Static analysis result for SHA-256 365a282fcde6da1c…

MALICIOUS

PDF

89.3 KB Created: 2021-08-14 20:21:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: fba2954b523ed4f019cec155745b5020 SHA-1: ee903e4361962bbc16ea27ec048ea1e86747d3ba SHA-256: 365a282fcde6da1cb72515bcd82485ca962eaa7b4014d831eaee171536832443
164 Risk Score

Malware Insights

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

This PDF contains JavaScript actions and numerous embedded URLs that form a link farm, pointing to other PDF files hosted on compromised websites. The presence of JavaScript and the link farm structure suggest an attempt to redirect users to malicious content, likely for phishing or to download further malware. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=how+to+make+a+self+introduction+in+an+interview PDF link annotation
    • http://grodgolf.com/clients/f/fd/fd83fa7079552abb47853a85229f74c1/File/76115979533.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/255517c2d186bbd94986f80984264d6c/lidibomul.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/fefudokawogidu.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/c1lui7pk6okhnsn3odjma7hke4/22294735386.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/ldhr5oohsia5ahn88qgkjoi7r4/rizijokebi.pdfIn PDF document text
    • http://billsky.ee/files/file/23265657244.pdfIn PDF document text
    • http://zuestag.ch/userfiles/files/3171809512.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/xajowudanogeveb.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160988cf5d8744---15270678180.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/64f06c0600cdeae2df69484283770f9d/89336359372.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/19993235976.pdfIn PDF document text
    • https://thietbivesinhsonhoa.com/webroot/img/files/zonisegexo.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/53kg2vchvgnrbfeku4q9qpnq48/janagavejidupidewevofifud.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941b1e47c07---vupodulitojas.pdfIn PDF document text
    • http://teplospectr.ru/images/files/gemariwunota.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/84454584465.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ed254109f---fuvitinudiginimuperegawel.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/wogaw.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/63593603890.pdfIn PDF document text
    • https://lemanssrl.it/file/77792833417.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160c039f94329f---wuxetowanagowuki.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/wivuxedabavasisimad.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/0307e92a6b279887ea40c460954699c9/perotadufopikinelovegojaf.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_off0000f7cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDD 17224 bytes
SHA-256: c5bb6db895cca1cfb81c14dcbfd34306e4f68d16a7be2bda9a1c688281059621
font_02_sfnt_off00013c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C7B 10972 bytes
SHA-256: 6b8e2bf71cf84a0add609ee47085456154d9f04e65f53c4fca21a9fb4534f81b

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