Malicious PDF — malware analysis report

Static analysis result for SHA-256 391c9e12b9784582…

MALICIOUS

PDF

73.3 KB Created: 2021-09-03 00:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4ac836f91ce8d4053ed269804d2bb25a SHA-1: 41a69608c8d21e182d6b286e41b53c2ab0715fc0 SHA-256: 391c9e12b9784582e5678511b06157d15ca96b552c9d779ad97a583845ae742d
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 links, many pointing to compromised CMS uploads, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to exploit vulnerabilities or redirect users to malicious sites. The embedded JavaScript is likely used to facilitate the download or execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://pistant.ru/uplcv?utm_term=man+made+disaster+definition+pdf PDF link annotation
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608146640155a---14517366255.pdfIn PDF document text
    • https://www.weldcor.ca/public/ckfinder/userfiles/files/89549179972.pdfIn PDF document text
    • http://latexindia.com/userfiles/file/76400814463.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/ur6nsmriapuk6ri9o1rppg0gh4/23900128047.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd21f8045c1---ruvikupotub.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3e96ee0263---47905366984.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5edf14dd91ce303ae63cb08c6d081986/34371114052.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a3abec05067---rivaludibodemejitonizap.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/42047636190.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/waxenevar.pdfIn PDF document text
    • http://about-dogs.ru/upload/file/nixijov.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/7s6ah4sdvbhoehdg0iphjqpvj7/60489841778.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c75bf1501e---jujinetaluwowukun.pdfIn PDF document text
    • https://avphunter.ro/ckfinder/userfiles/files/xivezavuxekesakubi.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/zuwakevidukugepizoneruder.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/35986060981.pdfIn PDF document text
    • http://argumentua.com/i/file/67584110981.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/tiv2lc15g3d9uev8bfdcfrj8b4/vovinibafeludag.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/bebe24e72eb395cc21869b441f2b99d5/95010265669.pdfIn PDF document text
    • http://mvhs1964.com/clients/2/20/2030ff4f331b14c2016b95997514b7ac/File/jerinud.pdfIn PDF document text
    • http://shrootgroup.com/upload_fck/file/2021-7-26/20210726080223307119.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_off0000bcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD509 16564 bytes
SHA-256: 8e8b97f3ea27c26e58e85e929c25a4c0f54b73ff74646b368c855ee45938369a
font_02_sfnt_off0000ff98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF98 10604 bytes
SHA-256: c521186adf0d217bb04f693c1e7ef3f0997177e774bdee9bbcef098d41912a4f

Open this report in the interactive analyzer, or submit your own file for analysis.