Malicious PDF — malware analysis report

Static analysis result for SHA-256 8195dec7a6461266…

MALICIOUS

PDF

75.9 KB Created: 2021-09-17 12:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 12988322e54419d04f2484f9492192f3 SHA-1: 43aa2167b02601d3c8f0abe2f671ccf9a7a31d78 SHA-256: 8195dec7a646126622ed6e1b95890940f1e64eeee8088736df2f5a4f33ecb223
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to disposable hosting or compromised CMS upload directories, suggesting a link farm designed for phishing or malware distribution. The presence of a 'crack adobe photoshop 2020' URL strongly indicates a lure to trick users into downloading malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, reinforcing the phishing and potential trojan threat.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://chcial.ru/uplcv?utm_term=crack+adobe+photoshop+2020 PDF link annotation
    • http://spharma.ua/files/file/xibabamugajizobusarapixej.pdfIn PDF document text
    • https://support-trevianum.nl/userfiles/files/27527980621.pdfIn PDF document text
    • http://columb-sklep.pl/userfiles/file/lagofome.pdfIn PDF document text
    • https://krainaogrodow.eu/zdjecia/fck/file/mexomaf.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614024df697e6---bumenerusadutetuxufomem.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/54629703186.pdfIn PDF document text
    • http://tecniagua.es/uploads/ckfinder/files/61993900612.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/85605096463.pdfIn PDF document text
    • http://zaintik.org/files/galeria/files/44260049652.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/161423386b2998---34800311466.pdfIn PDF document text
    • https://ottopianos.nl/files/tojevovivid.pdfIn PDF document text
    • http://syntra.pl/userfiles/file/kagozew.pdfIn PDF document text
    • http://rogersdesignhouse.com/uploads/files/49991465238.pdfIn PDF document text
    • https://kiofruits.com/admin/uploads/files/vefupoxenax.pdfIn PDF document text
    • http://bulmarconsult.com/files/4605457933.pdfIn PDF document text
    • https://yapluka-services.fr/userfiles/file/benedezil.pdfIn PDF document text
    • http://kaies.cn/upfiles/210908132440971734btosgo.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/6e3df9597424c444d977a46f5ac9dfd7/6085974295.pdfIn PDF document text
    • https://keepingscore.org/userfiles/file/xeludapobenenegeteni.pdfIn PDF document text
    • https://cahayaapi1.com/contents/files/50242284997.pdfIn PDF document text
    • http://harckocsik.hu/userfiles/file/35758535189.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2EF 10872 bytes
SHA-256: be05c8907b2e31629058a1a5ed6e63eb05ec0ce1feb7e39b0413dcbbf257dc55
font_01_sfnt_off0000dc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0D 17888 bytes
SHA-256: 64de12af3201f1da0772b18aec9aa1f0fc77e7ce6a605af4016d52180f9e67a9
font_02_sfnt_off00010a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1