Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a14391228da3fd…

MALICIOUS

PDF

71.6 KB Created: 2021-09-25 13:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1cbc917aa028c141d31732ead97c2e68 SHA-1: c1a358e2a893ebbd109b8e9b0e61cb0cbb3d8dfd SHA-256: 38a14391228da3fd1494dd2bcf6eecb6395ed210f2e4737b89c70e08a4d2d1b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://garglob.ru/uplcv?utm_term=how+to+see+deleted+photos+on+gallery PDF link annotation
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614085219af04---73117635338.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/9403559357.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c2994d5f88---zupipopabotonive.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/tibif.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/23686675405.pdfIn PDF document text
    • http://9262895.ru/ckfinder/userfiles/files/61976707466.pdfIn PDF document text
    • http://familiegravesen.dk/userfiles/file/doxaxujojifugumivejijomi.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/76761551277.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/sedananetobujadu.pdfIn PDF document text
    • https://tecnomatec.cl/upload/file/37834437086.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614dfe4eaadc4---14466353819.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/8130649732.pdfIn PDF document text
    • http://chinhsuasolieu.com/media/files/gavodimanafitozowaxujile.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/32532531241.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d901e3d10d---8356450034.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613800124173f---97510080831.pdfIn PDF document text
    • https://herfection.herfection.tw/upload/ckfinder_temp/files/20210920090248.pdfIn PDF document text
    • https://negaratoto.com/contents/files/bugimobewewazolo.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/27998038730.pdfIn PDF document text
    • http://jfhcoaching.com/userfiles/files/gogamekik.pdfIn PDF document text
    • http://preprod-proximeo.com/ckfinder/userfiles/files/48091062707.pdfIn PDF document text
    • http://neogmbh.de/www/sites/default/files/userfiles/file/93908782102.pdfIn PDF document text
    • https://photopoligrafic.ru/ckfinder/userfiles/files/toserovutupupenuvox.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_off0000b41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB41E 10768 bytes
SHA-256: c565b16aba733ae9412dc986d657f8cc0174d8f22ee9fcef514a16b14074f855
font_01_sfnt_off0000ccb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB9 17472 bytes
SHA-256: 3e3899371164d1354d3c49c7b39f08e6cbeb04fa8b6618dc4406af38a1e9a5c8
font_02_sfnt_off0000f91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1