Malicious PDF — malware analysis report

Static analysis result for SHA-256 92518fbaebc7d610…

MALICIOUS

PDF

70.6 KB Created: 2021-09-06 01:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: bc6ecaa36c72967f1a77e6fafbf3a4cb SHA-1: 8053049ae8a4861ccc3674f23bd6f6347b9fbcd5 SHA-256: 92518fbaebc7d61052e185a55d68bffcdd1be1483c0077ebab0a57a67e8c804f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://philabc.ru/uplcv?utm_term=islamic+hadith+bangla+pdf PDF link annotation
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/0314bb3e473fbd33d7ce916e2334184d/fazevowinitifiratomajesub.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/9dee44886aa04f486c4aade0d359137d/fumesataxozokub.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/xubavotagemagurivexajarul.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/domorebafojataji.pdfIn PDF document text
    • http://kurpinar.com/img/userfiles/files/guretolas.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096a7c25d22f---28242933751.pdfIn PDF document text
    • http://glenbrooksouth1970.com/clients/1/17/17fc1bd13d5538a69f39d58c869d2fc5/File/77147953134.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/fewasoguz.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/kivur.pdfIn PDF document text
    • https://parfumzone.ro/files/file/fidinosasid.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/f911c0a4a4430e644f55821b9cc02b48/81751287254.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/binopubafunin.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/dovemiwoj.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/zaziwonepiva.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910a84befb0---93312179245.pdfIn PDF document text
    • https://venus-forever.com/image/files/291786467.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/cd40ddc18e1bc6889673ce480ac9a7ed/20705249613.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/nomose.pdfIn PDF document text
    • https://e-fasteners.eu/media/file/pubukoxovigopos.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a70a72935---64951780339.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/69014197326.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/aca281a1226bc5820c0ca5905ee51883/juvovima.pdfIn PDF document text
    • http://titusrelay.com/clients/e/ef/ef304ccc03541e9e6382bef5f13b0a7d/File/13181480065.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa8437b323---51924756826.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/fujazi.pdfIn PDF document text
    • https://windsbs.biz/files/file/jadukirakofudixan.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/gatudikal.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_off0000b4b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4B2 10804 bytes
SHA-256: 5115e181c32c7320abe2ac8fc4d031b1c6b155b6ecac822237db983b29645d0e
font_01_sfnt_off0000cce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE9 15920 bytes
SHA-256: 7376b5b48bb2a27d2c0759451f6f0fd73b63c7441bf0f8e302f6c517d3625227
font_02_sfnt_off0000f4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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