Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e847b55d96c376…

MALICIOUS

PDF

80.4 KB Created: 2021-08-07 22:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c2ae8f83b82ec1365b7db83aea0d2416 SHA-1: c2541d8d8104c9845b8aacf0f3c9bb4f568c5ea6 SHA-256: 24e847b55d96c37674d9b4291965b33bd718b9882232d3128bc5b5097807f8a0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The presence of embedded JavaScript suggests potential for further malicious actions, such as downloading additional payloads or exploiting browser vulnerabilities. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://garglob.ru/uplcv?utm_term=crime+and+puzzlement+3+answer+key PDF link annotation
    • http://yacpa.org/yacpafiles/file/muzinogofudidad.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/91855612601.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/tizuvoxomagolovav.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/48599255682.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/d122ee47da2e46b245e488c7e04f19b2/78574937382.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210626013011.pdfIn PDF document text
    • https://sananselmo.com/wysiwygfiles/file/31747446250.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609df8a37e9de---tanok.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a8bb7f7f4e1---98675657421.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210624082114.pdfIn PDF document text
    • http://alkanboya.com/files/file///zudatobusig.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/a929c73p95lo6iv9l796r5sid7/lezisasizejituwe.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/3e22c9890c3125f8d1af7232b08e2879/tanugid.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/veletanugemebitefixijuje.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a23f2561c84---21471530963.pdfIn PDF document text
    • http://nzozkrowodrza.pl/uploads/editor/file/popisozejidarizibijo.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802cd5bd451---fenikuxab.pdfIn PDF document text
    • https://dolphinsolutions.net/ckfinder/userfiles/files/47126095593.pdfIn PDF document text
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/3018338717.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5e37e5f151b277d3ab2232c2106eea0f/lumalakapapidegur.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/89611101097.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b1116675d---welatibasurixosofiziv.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/15124370153.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/sodilusodolatajapolusize.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_off0000d284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD284 11088 bytes
SHA-256: e980f52b04c97bd8f5652abea246b2ad47b87800046df72257ebdae5ad2997b4
font_01_sfnt_off0000ec79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001048b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048B 17136 bytes
SHA-256: 00775bede5b21c51e356f479ac94f62b676411821eaf27ba1754e720935deaeb

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