Malicious PDF — malware analysis report

Static analysis result for SHA-256 13847e176a19601b…

MALICIOUS

PDF

83.3 KB Created: 2021-09-04 08:13:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 997d4632b626962012bad92aad7531f7 SHA-1: ca6381c8f64afaccf6bbca004d0dd09e9dbe7202 SHA-256: 13847e176a19601baeab516066c8a5d56c3e6db47b05aba74f03f2958799a1d5
176 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 to compromised WordPress upload storage and disposable hosting, suggesting an attempt to redirect users to malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document may be designed to trick users into calling a fraudulent support number, further supporting a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://vildmarksjagt.dk/userfiles/file/pilozaduzededefixuwi.pdf In PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/b614f171e93c40fb8f7c3467ed322c94/zufoduzurisekibeki.pdfIn PDF document text
    • http://tranhdaquydep.vn/upload/files/vakosanamojovuwu.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610bc0e307236---larazij.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa90edf15f---fegetebodijedar.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/dcb8d3125a004e2c4068cdcbc7173186/bovozukupaxidiguvu.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/790ebdcc9f17b2f990d95ae87313a99c/76017777604.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/sso3456pgt3vb0vv1pubik0jt4/pasavupalajisukegod.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/27062b58ff1692dc0eff2c4c82118b03/regerewixozatotubamujo.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-7-23/20210723173256637652.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7ddce20f3---xajarikazabakiganivirazir.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/38044988510.pdfIn PDF document text
    • https://pavillonwohlen.ch/userfiles/files/muzelupobazu.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/096403158c360401e595cece5af22693/zidoluxilivenigexipi.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/8vj3t6rpn55tatq12gco25q2dv/60332714525.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/0beoj4msljj72rukmacfsdo651/40181722410.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/dc9jl2qbab90g7vun0qo2s3im7/38239901357.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/7dd77452e506dd46683b1df8072cf8a5/88656111356.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/68170307591.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/cam7ed59ndavjiikjjup4mq237/63309173569.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/tedikogobadiruvijesug.pdfIn PDF document text
    • https://hosvagyok.hu/userfiles/file/49902429619.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/161255c8047793---satirerewikepunulepatuxuk.pdfIn PDF document text
    • http://skkouty.cz/ckfinder/userfiles/files/rizikerugesubu.pdfIn PDF document text
    • http://dongamold.com/fckeditor/upload_files/file/gofezugofajefame.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=west+side+story+music+score+pdfPDF 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_off0000dec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC6 18748 bytes
SHA-256: 1e4b8cea4ac5c9eb11e9cc0207a7210aee0408cef1c8a4741abcb3b97272101b
font_01_sfnt_off00010f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12770 10676 bytes
SHA-256: 7ef657e6124c7b9a9192041725727875e17f4b143ae426753080352ab7e9fc9f

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