Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e4591ac21984a5…

MALICIOUS

PDF

83.1 KB Created: 2021-07-15 17:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c08fdadc0fbea2ca05350b2089f8d361 SHA-1: e81701a60e6f4a58b746aa31ca79db94c8ee4746 SHA-256: f0e4591ac21984a5010ae7603cab08b70af2d78948b7b968c3c14494415ec16c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing embedded JavaScript and a large number of external links. Several heuristics indicate that these links are part of a link farm, with many pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://infrive.ru/uplcv?utm_term=start+a+sentence+with+us PDF link annotation
    • http://anaminfo.com/attachfile/file/80433379934.pdfIn PDF document text
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64935628224.pdfIn PDF document text
    • http://groupkaishan.com/d/files/dipibovomafisapibatanaj.pdfIn PDF document text
    • https://atl-50.com/files/file/28839846607.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb8d18f999---94075743518.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfe8290cc4---86439077008.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/31938018558.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/71825520444.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/tl82o3f355ot61mblrhok7homb/9017308765.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/mulisoriga.pdfIn PDF document text
    • https://actor-conseil.com/files/file/91535081975.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a07587627c---raxofewudokogerategepamon.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/setabum.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609896a768c84---pinizigugujepugar.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/saziwe.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16093f82444f1d---45668165648.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/xotenekiga.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/91964267794.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/20102307367.pdfIn PDF document text
    • http://quimis.org/js/ckfinder/userfiles/files/79474126225.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073759139a4c---12536964191.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_off0000e436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE436 16964 bytes
SHA-256: fee9493d7fa8dcd544f22884ae98c054c979d00008c31fc81adf88eac91cdfb7
font_01_sfnt_off00011014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11014 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001282b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282B 10424 bytes
SHA-256: 373ae4d488a6000323df5360865e92cdebb2912f7f2f9f2241df5ef6358c4894

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