Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14b4bc79a0ee807…

MALICIOUS

PDF

92.7 KB Created: 2021-07-19 13:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 83fa726d309dd7714f400980772dadc8 SHA-1: dfa46ffd65023e9ecb515b8a89a5cdc13c4898d0 SHA-256: e14b4bc79a0ee807bb6e56aa7c555d0eb520e97ef365e1473ccce144270062af
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample contains embedded JavaScript and exhibits characteristics of a phishing lure, including a fake CAPTCHA prompt and urgency language. The presence of numerous external links, many hosted on compromised or disposable domains, suggests an attempt to redirect users to malicious sites or download further payloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://normandyclassof79stl.com/clients/e/e1/e16d7b8530e96d8d426d6b963c92b0b5/File/xafejewamidulaguteza.pdf In PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/23f8ed9b26cd46d238b942fcae6f9e0b/dedofipinojatuvixafemok.pdfIn PDF document text
    • http://uamarkets.com/images/file/19668696488.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/82888475030.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bda49a865d1---65724406574.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/madujodubuzitifazol.pdfIn PDF document text
    • http://1960whs.com/clients/7/73/73384dfd0d582a2861cf356c55c3c578/File/legovujewibawubaf.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/redupataxenurewabenid.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d1491a819---dakolare.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/67176952465.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/sonezatevafi.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b40c486ba4c---kaniz.pdfIn PDF document text
    • http://azizolace.cz/images/file/6198132943.pdfIn PDF document text
    • http://webdulich.com/js/ckfinder/userfiles/files/tedokarezalexuxevuna.pdfIn PDF document text
    • http://noithatlekhanh.com/Images_upload/files/49785913835.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/04ek524ignbb7ppt8etpqekit9/matemigepipalenesas.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/84981237493.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/10076011855.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/pc9rbgp66cnr8gvfl0cqvc3oe2/24052853180.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855a1491511---duxunituwufixuneluxojak.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/81b63ba07f2c58806faecf91996f7cb1/pilopitadalikekidebig.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/ljgn59dpufig5teeoi4s3bmh1f/soworetudufalidimumusoxuv.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/ut5l8f78fkrfctdofb8mtedqd5/54827829264.pdfIn PDF document text
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/wamafujaronebikofi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=best+free+cloud+mining+sites+2020PDF 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_off00010421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10421 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C38 11052 bytes
SHA-256: ab7eb1517874b766a284b38ef58974a58c1b8b72610a18f69e8581ca1cf599fb
font_02_sfnt_off000135cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135CF 17476 bytes
SHA-256: 0b19c1e7c6ec4dca32da2487a55d0384cde24186f49fd2959d56791b5d7e8a19

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