Malicious PDF — malware analysis report

Static analysis result for SHA-256 60de5ba0c26a4302…

MALICIOUS

PDF

79.7 KB Created: 2021-09-02 05:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 782375822da49e386debfd500aba1e59 SHA-1: 135283eefbe13e83fb470266b8108b4460d1a9e3 SHA-256: 60de5ba0c26a4302bccca0d9763b34738735865450d166d35c781d94dec47c2c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely to distribute further malicious content or phish users. The PDF structure itself is also noted for having duplicate object bodies, which can sometimes be used to hide malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://baxsporthorses.com/userfiles/file/pemopelomevivekiser.pdf In PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160e6bbcdab288---83268328241.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6f1f3d500---gupopuxifur.pdfIn PDF document text
    • http://www.serenissimaservizi.com/files/rikavesad.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/42ol4q2r7qb8tqd03brj0khvho/26673577542.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160831b0e7e2bb---regogodanesifexagevotoz.pdfIn PDF document text
    • http://pegastelco.com/pictures/files/44227927474.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/61929285aff47816eb18c909ef01b5ca/35297344012.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d25077da9---58736328557.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085caa715454---videjaritonuwosojizonixo.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0a6cc8df3---jojefejag.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/notudaliv.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/uqqp2o0b85ji0gjket91li1u2t/kafosadumoxevejigaduzi.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/12088699026.pdfIn PDF document text
    • http://ideas4mypool.com/userfiles/file/loxesufiximidelanokebajow.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/440e80c253145984f3d46ca5a4c0258c/gafamojabiruwagotila.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/2819766028.pdfIn PDF document text
    • http://zjxfjc.com/uploadfiles/files/fofefaw.pdfIn PDF document text
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/d4f21c427bb6d6465dacbb38a5662b0b/6306631755.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/28186991ae7b6315279ef943f574a32a/30662406372.pdfIn PDF document text
    • https://gencerenerji.com/resimler/files/zijuzevaw.pdfIn PDF document text
    • https://fuchscars.com/wp-content/plugins/super-forms/uploads/php/files/2436fc9b6af6589cbda914934bc8ae3e/36644787760.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/fenadebugalojuxinavelaxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=csir+net+physical+science+question+paperPDF 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_off0000d1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C3 17372 bytes
SHA-256: 8bb56199c735b0f6a751f53fd84499360d9d9eac9453b47fba28cd090beaa707
font_02_sfnt_off00011714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11714 10864 bytes
SHA-256: 011899f44e1f79608bfda16d52f79cc439ff4cb757f7f29c101c0ee2f06f5cf1

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