Malicious PDF — malware analysis report

Static analysis result for SHA-256 1827fe407559da21…

MALICIOUS

PDF

92.5 KB Created: 2021-06-29 02:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ecdaf95da983618090c9b66c55c9ec7b SHA-1: d7b3866bd216897b9fef74ac6d3d2d4cc7b37c91 SHA-256: 1827fe407559da2117883b66b2d875c1af10121cc916a964a61e69866064d9f8
156 Risk Score

Malware Insights

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

The PDF was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and the use of 'utm_term' parameters further support the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://granite1962.com/clients/869125/File/jasiwofivonusel.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/08e4799766b9ca02a61f4636e1ba1762/jekewujajin.pdf
    • http://gsmontaggi.it/userfiles/files/zemedulewur.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/2bcee8211635d56a68391bdf0d6a9718/xivubakisef.pdf
    • http://allaboutdowney.com/userimages/56060430940.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/rnha6mnpomou7jdbsdfqsmnuc0/51467701993.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c170c91840a---94955837527.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160da3efa78c85---wanitavelel.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/360c58c72dfd15d30c76fb69ce8d32c5/juvogopa.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160afc147b2c4b---bujutux.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/aba5a31537b32a68b2063cc2c4dbd1e7/91590255403.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808bbd7412d---kabodobawipufikumupo.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/dmp7u7ft9dlnjm4ir1vntjoptb/44677426732.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/1tu4s13oe0s8j0h0nq4dqoroeh/zovomuv.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/6itu8hhuqms9ops69aou0bmq91/98180698748.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/810186676ed7d31d2b0f886ed515432b/64139135480.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b975c9fa8a---xofosolinofovimexoja.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9fbd1bc01a---xuxapumakutodalok.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/809bd081f3fb63a8cdde6762161b3094/25906932863.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/da0b78cbc1a3b435daaceb1727c6efda/39278950979.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/742f82e89774446020118a6e70863b29/defefexofizut.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e1090ea9a---tumugewanex.pdf
    • https://ludifrance.fr/userfiles/file/50203177104.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=it+seems+like+meaning+in+tamil
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010817.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10817 16792 bytes
font_01_sfnt_off0001202e.bin
eda617771867ee51889822172dc1ba1544372f73b1c7ff5140d11c046e1a8e48
pdf-font-stream PDF embedded font (sfnt) at offset 0x1202E 10272 bytes
font_02_sfnt_off0001373c.bin
152bb4bfdb41e941679afee227964568486709c70c5980cf15ee96c9e592c9d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1373C 16856 bytes