Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e391955a54a2393…

MALICIOUS

PDF

113.2 KB Created: 2021-07-06 02:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 6be42ff11f3fecdb67c5f0d9cd4d47cb SHA-1: 85c690cd36d058ac39fa6a82df55c1b3a46d31fc SHA-256: 2e391955a54a2393f68eccc18e3a6ab5972c8c0a2390704702c601c35af01c3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 potentially compromised websites, likely intended to lure users into downloading further malicious content or submitting sensitive information. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9792

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://dansecyr.ca/pdf/file/87122264068.pdf In PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3cd86d9c3---50894692010.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609421a531943---84052088578.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/06186faee3f000cd4da20b056916eca5/17304490983.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/33860810086.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160760894e13ad---27986271398.pdfIn PDF document text
    • https://ebooksweb.net/files/file/47834200719.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/3e994d36f23276fc2130ad674dd94efe/zepovepuruvedijifilemeku.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/fefdc86f261a534b06c2f03b5b3b5f1d/sumibelatimezini.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210508021150.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/31170936360.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b82a33f00e---xuvexi.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/1a4cc47a77bee54efe13ed83843aed81/semesirofixotawu.pdfIn PDF document text
    • http://pajurioverslas.lt/ckfinder/userfiles/files/42774847683.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/d2fcc4a3f580d7c3cd8be92672c3ea77/98359027075.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a3540b9d501---45063723963.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/gixedapezaboxemur.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc3cee35a9---tawili.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/3c8ec7dba1c1793138f0146626067390/birozidini.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/5s0r3k2tiusp47si31kgfreilp/90133902472.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160870e40e3665---pokizizof.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/nobaliwokuseduposabab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=barbie+and+the+three+musketeers+full+movie+in+tamilPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EB 3472 bytes
SHA-256: b97fb78270db605d2b5fd39b20db21f8c621068d3e869c1e88c74de03b65bd11
font_01_sfnt_off000120db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120DB 26800 bytes
SHA-256: f4b44fef57a173928ac1cdea9285fd0e7907d4afeb8d049ca0beaa751fd45ada
font_02_sfnt_off00016522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16522 11072 bytes
SHA-256: b1b5af867ab90f5633a8c92789e4a67c24890a169f761605a1bd6d381110755f
font_03_sfnt_off00017ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off000196d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196D8 18788 bytes
SHA-256: e0594b372aee79675973a5c5b9124270010d7ca2996d9058d63d740d1180459c

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