Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ea56efa927eeda…

MALICIOUS

PDF

95.2 KB Created: 2021-07-22 20:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ea007b2ac5f355ceaa8a26b59693e709 SHA-1: a6a106b687f3ba2dd7b588ada70f058a25e23b0c SHA-256: d7ea56efa927eeda96e2363e79ce271322a69e2086a8440402db69e044161f42
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. The primary purpose appears to be directing users to potentially malicious content hosted on these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://stepsforstarlight.com/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/wifiraxadefejal.pdf In PDF document text
    • http://nensi.si/upload/file/lezilu.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160775ce0aeeed---49474490125.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/lipobavejofuwunexomideta.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/zikedigofafoferirifuxibav.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/0854d75cfbbfd3db7722b8373ae97d6d/nexesederuvifawe.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b69eea5bb---dikonanodezegu.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/nipogexapeku.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/2076767829.pdfIn PDF document text
    • http://dhf-china.com/d/files/9876793468.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/7290i7dfk2kp0rcfk1hpjtos75/11930804566.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16071ccfb72d7d---giludoza.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/e6953aa8849fda80b5e9df26eafcb7c0/wisajisijuxufigutilu.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/87740480000.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/33213469261.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e1f965035---bejazavazunelozamaka.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/vapofiludedijor.pdfIn PDF document text
    • http://ballstonfamilymedicine.com/clients/861402/File/laragomeja.pdfIn PDF document text
    • http://abpaluso.com/upload/file/bewamewozar.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/61722259382.pdfIn PDF document text
    • http://vswet.ru/f/rajipajisox.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/12403661203.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=abdominal+pain+6+weeks+after+c+sectionPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/26d2e28034248b6e3c373d214b669cea/ruwoxezewixowixivudusa.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_off00010f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1E 17392 bytes
SHA-256: cf0cf086178861df4a8a4a8ac76a14e6ff5a27a2e08acd219d4a7eb568c01608
font_01_sfnt_off00013c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001549c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1549C 11248 bytes
SHA-256: 026f3241fc7b6cfd751f19febdf35e9c37045d4b0008389c674eae605cd751a9

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