Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f17a7b2fe40acb8…

MALICIOUS

PDF

79.0 KB Created: 2021-07-10 01:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 33d8da7de907fce7f0fca0f6976b6d45 SHA-1: 38ee8f2e7c7420b4e10ce627b964598557bf1828 SHA-256: 0f17a7b2fe40acb868ef8ea496a9a6d8b0e62258f5327d19dfabd8959e6e16a1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or delivering malicious content. The file also exhibits characteristics of a link farm, with numerous external URIs pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious sites. The ClamAV detection and ML classifier further confirm its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.
  • 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.
  • 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://irlanc.ru/uplcv?utm_term=quotes+about+people+being+there PDF link annotation
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/gv7q5qv97ph3a4326tg07hvq46/83285778527.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c84bd37f1b3---wadojegavib.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/axepa.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/67162409765.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/81564457209.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160872a4c2c2cc---11874396615.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a98c296826a---wigizegebudod.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6faa996d97---xoduselesasufoxeloje.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e578349f0f4---fadizufamefe.pdfIn PDF document text
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/42243143821.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/t7tu34kukqu69u4rq1psk9c1j6/sowiwaxibapi.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56ce793f6c---xebigupuwilaf.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/2e547a3689de4d7489fa6af11984b522/xoripipakesi.pdfIn PDF document text
    • https://okud-istra.hr/userfiles/file/menaz.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f230662dcd---xisafuxotobizasa.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/fb8a49823dd510d36634095d9ed2b48a/94871026479.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/kukunodedejotozib.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7b9041e01---towakox.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/warovirezugizuxi.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160904e7c0ca3d---27415302977.pdfIn PDF document text
    • https://aspirans.com/files/file/vapekafiwovumijaw.pdfIn PDF document text
    • http://a-daily.jp/app/webroot/contents_img/files/vofuzibimi.pdfIn PDF document text
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/2kh7ktks8l90mrojij9dhcbi1e/29992059212.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/634e76f1aba6d8f027b4409739691055/12379549028.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_off0000d25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25F 10828 bytes
SHA-256: b9a6f1b1439df374cad7c1ba243ffd23b321f665f4068d3b0b2cc7ee84bb0b08
font_01_sfnt_off0000eb27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10339 16920 bytes
SHA-256: 363d766825df76275b035fdf20c093a98cfa6e2a73efdad321d3e3ff493a06b5

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