Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d490e7a85e32d1…

MALICIOUS

PDF

87.6 KB Created: 2021-07-15 12:34:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: edd051ee8d194ec5ed602becf4f24280 SHA-1: b5a5ddad93970243d9ffc023859bb02d799a2a24 SHA-256: e0d490e7a85e32d150c8b74dfaee2ed0676d57763e2f0f81cd7e1cc63e0a41e3
156 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm hosted on compromised CMS platforms, specifically WordPress. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs point to suspicious domains and compromised upload directories, indicating a potential redirection chain to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

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://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/thl0idj01ist14v2junqjkjrib/59827147151.pdf In PDF document text
    • http://beveragesgs.com/userfiles/file/xeliperanemina.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790a09a85b7---jovaxuvewafuwi.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6d52330eb---73103286609.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/6582f332fd3b0735f4ada57992f34c01/60900469631.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/5cb1ae7b255cf695fe5161e43ffa3549/26805944180.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/310711fcb936a2d4ec33b2753471575a/40839008553.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/280ad4ee714ce5c0a53c09881ef30f57/wibesilefimibagaru.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/84714986863.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/4870e03d7589a466f3bfcdcdb6c20348/jopesinarawotoseli.pdfIn PDF document text
    • https://chulintemple.org/CKEdit/upload/files/nigaluwogovisejur.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085192c9aff2---zurigeduminosebur.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/300b36e55f705470e7160dfa8e13f28d/nudate.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16085bed3587ce---5777291695.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077519b79489---110790781.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/15452904042.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/22716304115.pdfIn PDF document text
    • http://laiksmodalux.lt/app/webroot/uploads/userfiles/files/jewab.pdfIn PDF document text
    • http://aiken7050.com/clients/5/51/510ae66c864a6d23552e02d1b5190e2c/File/67664985385.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/67032359229.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/t6hk3cffa077racvt74g5hevd5/fepetibixuda.pdfIn PDF document text
    • https://paulins.se/anvandarbilder/178/files/98434036629.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/10343064622.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077eb20e5b01---zepajamojaruvifol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=bade+meaning+in+englishPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB21 16356 bytes
SHA-256: 92baae0cb588c7d168865d0f9807a0be36df20a112ce5d257935f632c177ec0a
font_01_sfnt_off0000e1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A0 1764 bytes
SHA-256: 6ad0c346cabd50df728e3cc8cd75d544e37f6d2e0fef7ee945652b87f93a3177
font_02_sfnt_off0000e9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001020c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020C 10428 bytes
SHA-256: 0e7fd56567d791a207e960ac8594a86f635878fb5cb91992e2e049449a50c325
font_04_sfnt_off0001192d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192D 21524 bytes
SHA-256: 0f92612d3d7ec776d2a0f5ec1a06af80d21cea84d8068f603c3c40b6ff4002c0

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