Malicious PDF — malware analysis report

Static analysis result for SHA-256 0086503b0baa7496…

MALICIOUS

PDF

95.2 KB Created: 2021-07-31 08:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b5328a44d633b636ba1787800b1431af SHA-1: 297a3796daa57c2eb25d1fa8ad9c416d9712a2c4 SHA-256: 0086503b0baa74961f0e9728e4a1fec34a4639503d3918be34605f097bcbb37f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, many of which point to compromised WordPress sites acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Embedded JavaScript streams are also present, suggesting potential for further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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 http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbac95dbf90---ruwimokitipokowos.pdf In PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/4a8085bb0eb22719bca557fcb9fb43b2/95925362550.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f37f3c19d93---93327698322.pdfIn PDF document text
    • https://digireg.it/upload/dodozowamavalejalukafose.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/606b12d0b5bd56f8cde55aff692b72f1/jodetomedakokobetu.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782a7fcb92f---61968083400.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/8549133407.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/bfe4d952e1247d8e607c9905f360b47e/rolozukowipupa.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/63934070238.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/c5d49ae3a3b456679b215dfce422759d/litefabusevutinadajuv.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/fa980bd3940d759ae15e1aae90cf4f6a/92748891538.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/701a11da433cb0a5df6af8b594ae7ee8/razorixuxivumisimigifu.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/f3df5bb75c95e53ec7dcbb427df5f2f3/57865967812.pdfIn PDF document text
    • https://jobtiara.com/files/files/83794051285.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/texusiremibufod.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/9851853232.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/84514376449.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/3hpid55v8srd9ep605icc1qkqp/75872105795.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/0654a345bc60a4be471c665a40139bdb/50292580571.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8319cffe5---11501209493.pdfIn PDF document text
    • http://susutour.com/userfile/file/vawefogazepudu.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072f25cd0222---kutunugazunenakolomib.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/73348236048.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=fahrenheit+451+part+3+questionsPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47A 17480 bytes
SHA-256: d9c28cc1493abeceaa23d60f1696ba812f57cf2eed49b4b4d85e8ba39f82ee30
font_01_sfnt_off00012210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12210 17560 bytes
SHA-256: 180b39486d93218575fbaf9b5b05db2c579c9768a701f6e3d555354f73e8f2c1
font_02_sfnt_off00013cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC4 10960 bytes
SHA-256: 35ace8ace544676fcfb75ec4ac46057e7e43658d462dbaea85522b7349a2a7ed
font_03_sfnt_off0001563a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1563A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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