Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e3b1cdfd029cac…

MALICIOUS

PDF

81.1 KB Created: 2021-07-13 20:34:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 953e3bb37c59a28ac401a4aae260de0a SHA-1: 48693b518530fa51b0f57645204c4a44040fe546 SHA-256: 20e3b1cdfd029cacd8aaae7bc4cd6f15f7c36d66b56fbeebae07bda1c033ba9a
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://a-pluset.com/userfiles/42507337166.pdf In PDF document text
    • http://mebell-city.ru/ckfinder/userfiles/files/gavewaginasufulesofaza.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/16685813190.pdfIn PDF document text
    • http://dnepropress.net/files/file/46204670100.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5a6dea93a---lalewo.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb45174a96---93191854543.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/85712924606.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/penolinojedipo.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/gewurisevozibovawidaj.pdfIn PDF document text
    • https://bkht.vn/userfiles/file/dasiruwunotenotigidufak.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/rimijap.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/maloval.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/6e1f535238c2e14b787e5f74d7fffd99/53865354027.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/rasulotenuroduvovize.pdfIn PDF document text
    • http://hak-al.com/resimler/files/36930553798.pdfIn PDF document text
    • https://edusfera.pl/upload/file/14511111258.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4c6bf2364---temadeworowirowafenarixon.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad7197f2f6---ratumaxuzefowekigiduju.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/7334971b4206d53053520a374dd4ddcb/zudagowibe.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af6ca62b94e---xutowikuvomiwizigamij.pdfIn PDF document text
    • http://celcg.pl/uploaded/file/50032386492.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/fee6c3d8a6e19f0659d9bbdc9aaa3ff7/jugamikeme.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=tribute+coffee+housePDF 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_off0000db54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB54 10324 bytes
SHA-256: 32013f4143637120aa1206333ddd70e4618bd3d43d4f9d358a0260141f04fd77
font_01_sfnt_off0000f2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADC 17232 bytes
SHA-256: 26b9bb9da69711b82f3b70c14f1a124f9d8370a0acd6cbeaa3bea3225adb59c8

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