Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e64a33fe13c239…

MALICIOUS

PDF

98.3 KB Created: 2021-09-15 06:17:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5debac271d0974522e90bb8c0651ccbb SHA-1: b0fb1bfed675554fd54ba27e927b58fc14270d24 SHA-256: e6e64a33fe13c239b6f99beaa01d40403ba809a9f2e1ca852930106dcaac54a5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. It contains an embedded JavaScript stream and numerous external URIs, many of which are part of a link farm hosted on potentially compromised or disposable domains. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://allytemp.ru/uplcv?utm_term=fortnite+mobile+android+epic+games PDF link annotation
    • http://jamones-luna.shopcloud.es/ckfinder/userfiles/files/51205884028.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210909115937.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/tetofizek.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/watexupifuwuwap.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/bisovenaganaxad.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/86967692678.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/13048453809.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16138f0cc64dbc---tuxasoxatinebagezopemalir.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/pebofurukigisekojove.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/91209145246.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16141621e4c800---jefefinej.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab42c4b54d---65983249989.pdfIn PDF document text
    • http://turhantur.com/turhantur/files/nojofifoxapexenoromun.pdfIn PDF document text
    • http://www.msjcongregation.org/www/js/ckfinder/userfiles/files/59372395276.pdfIn PDF document text
    • https://oreopay57.com/ckfinder/userfiles/files/lasufime.pdfIn PDF document text
    • http://myatkinsonfamily.com/userimages/31367716768.pdfIn PDF document text
    • https://3rproject.eu/ckfinder/userfiles/files/70218665541.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/93050025195.pdfIn PDF document text
    • https://endeligmandag.no/e-brev/data/div/suvugutomotebed.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/44406893400.pdfIn PDF document text
    • http://zeroseistudio.eu/userfiles/files/94886550256.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/hj3g1ju5jhi814vgv2q4h1m17n/kijunagusirejawiboru.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_off0001129d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129D 22144 bytes
SHA-256: ab5c9d2d4e08a6e73d1e2a57e75be4632ac44e52bb9ae276162e4a38e681d3d1
font_01_sfnt_off00014a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16272 10976 bytes
SHA-256: a88e234a8ce5ed72a54108e3ee064ff4ed189b6cebd8c29b455d90619499c100

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