Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f9f10d9825073f…

MALICIOUS

PDF

119.3 KB Created: 2021-09-01 21:15:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 664d99fc4de04d73ca9613b89e4e744e SHA-1: 6d7bdf2446ae0e22ae1aefcc33b9a75cabac8444 SHA-256: f3f9f10d9825073f19900e9a5d7c100a1ee93d40b088cf8899986c3ee47c7503
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites and other disposable hosting. The primary purpose appears to be redirecting users to malicious content, likely for phishing or malware distribution, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://irlanc.ru/uplcv?utm_term=charmed+online+with+subtitles PDF link annotation
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/b3b109590dc0e2a2c9b00da7b33e88b5/dikubuwejubu.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/89o0rubtlkf2qm4voh6melac2q/tawamixotevexuvaxebo.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d26c7d9071e---54040858463.pdfIn PDF document text
    • https://serini-cloud.pl/uploads/editor/file/kugedimumedibofedijuj.pdfIn PDF document text
    • https://retta-bg.com/userfiles/52228273111.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/78207629261.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608699fe73965---vimamopumu.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///21162818912.pdfIn PDF document text
    • https://wisserarm.nl/app/webroot/files/userfiles/files/melexogegamasusug.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16084a5292e650---gevubofojobamalitilabarir.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/68668338439.pdfIn PDF document text
    • http://okwecare.com/usr/userfiles/files/fimazawezufam.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/40411978135.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16110fbee0814d---12484539887.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16126fa91cd354---10420973748.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/41221991634.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/kkurl2qqmv4gbi3j7p654ed9tq/malawamiwobowurixana.pdfIn PDF document text
    • https://justbuymeds.net/userfiles/file/fupugutox.pdfIn PDF document text
    • http://chukgoobok.com/files/fckeditor/file/47124257548.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/52598634886.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/19859495296.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/jekewadeleroj.pdfIn PDF document text
    • http://hsiwww.com/image/files/20210726_070949.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CF0 18184 bytes
SHA-256: efe436f6a0fa864d48dd069ab9bda7a101be6251134b44c9b470d86a19a7d938
font_01_sfnt_off00019bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001b3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B3CD 10872 bytes
SHA-256: 87c6ec84ca03883e18eb6d442de74abb484e1227373f101eba09e599499a80dc

Open this report in the interactive analyzer, or submit your own file for analysis.