Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d184e6a4ef8ff7d…

MALICIOUS

PDF

83.8 KB Created: 2021-07-04 22:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: d8bd4464a81e3fe343c61cdea8fe2736 SHA-1: ca87c5ab1ed8233e45287806866a55034ec0c7dd SHA-256: 4d184e6a4ef8ff7dc314a0b89a2f54f52c9091a49053ecd56826294bb763bd14
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to exploit vulnerabilities or trick users into downloading further payloads. The presence of a link farm on disposable hosting further supports a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://drafthe.ru/uplcv?utm_term=letter+r+to+color PDF link annotation
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/lakjchibfpvedsou8c0bnv20lv/bobilosazade.pdfIn PDF document text
    • http://westleyden72reunion.com/clients/4/46/469dc9162705cbff2d1fbe132f144f37/File/30442536301.pdfIn PDF document text
    • http://simonide.org/userfiles/file/womunemibegaramiru.pdfIn PDF document text
    • http://geasit.it/userfiles/files/94176779536.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160770aad8f156---pezudosaresosepubivudafe.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/kuwotarejekiwugaxuzogakaf.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ae6351f3a---84033920357.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/vavojefu.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/g02439g10tlnt7mt6gfff4lt7v/nepuzupakedefulezogipowus.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a406cb8a55f---82511485919.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f7beb0c4b---90698440435.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a52aacf4a7---gojujarujofasipixopubel.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021052011174050.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/naxosefunegenekarigane.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/0pj3qv603ktaghvn8dsofe8gqe/82610661867.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/facd580a8c14827f9f48397353420655/57229193518.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/18583601538.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09104c3840---16167858948.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/72891882561.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/3nm94en7956ln4vrnggr96ffqj/setevozivewukafu.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ac29bd5619a---sekumikekekenixuxoxebu.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/oecaepinmorv6tv2nignch5eo8/39605518031.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/901c0869199b569c674fcaf84e044053/83796826317.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FC 17560 bytes
SHA-256: 22e18736f0e6c5f4e57f88fc178e6afa01b37c46460211d479306ba7514708f4
font_01_sfnt_off000114f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F9 9652 bytes
SHA-256: f23a5b46561fb2127e4e31096037999a4e2a5ed14c4beab209915f1a7a9492d2
font_02_sfnt_off00012a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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