Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff02d5089cd37bcf…

MALICIOUS

PDF

76.1 KB Created: 2021-09-13 23:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6875325dc3b2a545a1551b238b3b15e4 SHA-1: e85d42da550b93b0086c78f51fb11c0d08fa7eb2 SHA-256: ff02d5089cd37bcf9ab7a0ff63648d7d6e8ff16fa9e1b2c7fadb4c350c9f3826
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple external URLs, many of which are hosted on compromised WordPress sites, suggesting an attempt to trick users into downloading files. The presence of numerous unknown URLs indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130f15e7472d---70539885000.pdf In PDF document text
    • http://lafiestadelmoto.cz/files/file/gebarutuzodaziganu.pdfIn PDF document text
    • http://at2apigroup3.com/contents/files/69777329941.pdfIn PDF document text
    • https://bibonatura.com/ckfinder/userfiles/files/sasamotilonogexewotuv.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210902075304.pdfIn PDF document text
    • http://gandolfiarchitetti.com/userfiles/files/7976125509.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/85557807388.pdfIn PDF document text
    • http://ilkconstruction.com/Images/Media/files/povisa.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/8482695258.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///2298661720.pdfIn PDF document text
    • http://camonetinternational.com/files/file/35891949765.pdfIn PDF document text
    • https://rosanaalvarracin.com/userfiles/file/dotuzo.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/tevonanebup.pdfIn PDF document text
    • http://novo-foto.ru/ckfinder/userfiles/files/43048297085.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/rubopibiwilafiboruxu.pdfIn PDF document text
    • https://institutdesante.org/userfiles/file/galixesifivalajibumazor.pdfIn PDF document text
    • https://printjet.pl/pliki_user/File/xupuveliwuz.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/mvemlj5fjirfeh034np6dema6u/visaburutulemidupelis.pdfIn PDF document text
    • http://bfttacg.marketsearching.com/upload/files/vugus.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/sabixi.pdfIn PDF document text
    • http://shahgrp.com/uploads/20510909106.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9fd7cc2f9---defezunugibasodenur.pdfIn PDF document text
    • https://miraclechuppahs.com/userfiles/file/48340374160.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/finulogidesasa.pdfIn PDF document text
    • https://hoavily.com/uploads/files/62443904216.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=android+studio+apk+download+for+androidPDF 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_off0000c722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC722 16568 bytes
SHA-256: 0afba1bd5b6a91384bd9482eca344d6d1836d87c55c8781ba74a8b8d72075a47
font_01_sfnt_off0000f1dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F3 10616 bytes
SHA-256: 3321d494bb1b8c8792f203173b08533ee18ee07ea3547c1e3f5c9c81635f7c07