Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7fe46bde8a110d7…

MALICIOUS

PDF

95.7 KB Created: 2021-09-05 11:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 646df20a5c5681686fce5d1b8841daaf SHA-1: 1193de70c042ece9a1f2fa2aeb10efacdd025874 SHA-256: e7fe46bde8a110d74ec261674ebec0f97192451d87049fe38b4e0a2063662627
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of numerous external URIs and the 'link farm' heuristic suggest the primary purpose is to redirect the user to a malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://turhantur.com/turhantur/files/vabebumopetaw.pdf In PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/12b07f0dd21e7c4a85bd8ffeeba8cb22/pokekovogelivuji.pdfIn PDF document text
    • https://schmitz.cz/res/file/85292835811.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160b292ea73695---pesafaraririladosevu.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/duwunezewolovobepimijugu.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/a13db72a6f11e194d19d820f07a56ade/38741724067.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c283eddbb2---josipirada.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/ggsnv0becjo16n9g49jf1ipe9b/33191608282.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/efe596d034c8fe8aafbec3ba084293fa/fogikegunijarusutifelivu.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772e1b049d9---94035248464.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/8d8d37bdd461c83d8e98cbd3623e9cfa/32768101966.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a6592f1c1---nenebaxi.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/66572192618.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/23024735235.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fa8f96e636a---votizigajezezegumo.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b18d333474---12579776673.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077600584de4---renoretudivatuge.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/d8f1392fc22965ddf692ed898c939cd2/38900729459.pdfIn PDF document text
    • https://puppometalli.eu/file/92536939328.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebaf4acd90---nugizilufikuve.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/ferezetovopubu.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e46b805cb---85946727532.pdfIn PDF document text
    • https://duocvinhkim.com/userfiles/file/12094876082.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/35202320888.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=considerations+on+the+government+of+poland+pdfPDF 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_off00010ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBE 18772 bytes
SHA-256: 3ae793ec3b6b15b12c0cfecdd3532b06af309ab95011d37642408e210e1d4dd0
font_01_sfnt_off00014015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14015 11040 bytes
SHA-256: 454646fb68277b219f59ce1179d8301dc718e4d7a5280b8ce93bd3e27ff3b8cf
font_02_sfnt_off0001596f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1596F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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