Malicious PDF — malware analysis report

Static analysis result for SHA-256 37c6679a5cd52b97…

MALICIOUS

PDF

92.7 KB Created: 2021-08-07 15:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2a5ae56b0157cdd973c2a6fabcb13707 SHA-1: 620bdd1150ae7dc7478afe944cdecca41b9e15b4 SHA-256: 37c6679a5cd52b970e05a812ea83925567a946e03f7359381bffb860d200fa9c
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised CMS upload directories and disposable hosting domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://www.radiooro.com.mx/media/images/uploads/files/lubip.pdf In PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/4fd58326dcb446dbd4e3948312529d08/8219299188.pdfIn PDF document text
    • http://zatuchlina.cz/upload/file/karesibabuwobivapibamawik.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/8445025236.pdfIn PDF document text
    • http://candientushinko.com/images/file/39678319355.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/vjcv8cska6esl0ke4kphlp5a21/9806467252.pdfIn PDF document text
    • https://medius.sk/userfiles/file/berowinugonelakikaraleji.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/67852378041.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab1d399a72---20147850322.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/36493032191.pdfIn PDF document text
    • http://rococosofa.com/files/files/56629539300.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/c3b380ed8eb1a13304d9cd833e317e52/46120392837.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/cef506a9ac38bd63df05b56d488bd302/87457713883.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/03d97b61c99f4086a315a7e1abb45704/74221303719.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/j8buavctujue4ibd4cnht0b4tv/40576599558.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/53823900505.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/ed337baa81dc76f097059871e4f9327e/34007761650.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/51846258230.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/q4uo4c2ikpiflclcs6bmj2f42f/xevinafonofis.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/e0336cdb7754f4fc4c9b786035226215/wetexed.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/selikegiwonumululamo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=what+is+the+theme+of+the+two+brothers+egyptian+folktalePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE1 11228 bytes
SHA-256: f41c8dde28169c6ecfe0ad8e56b949e0ede23e894358774868cf4416e97fff03
font_01_sfnt_off000116da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DA 20664 bytes
SHA-256: 47f06c8864befc36fee9316a972b882ca90dae5ef13ade8f6e24ce571f6d856b
font_02_sfnt_off00014a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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