Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf46edda5c20eda…

MALICIOUS

PDF

89.2 KB Created: 2021-06-28 16:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 5305cf3fc0aa143074a69c367b0cc1d7 SHA-1: 0583dd780bec903c10a1fc3c802345961d1c934f SHA-256: daf46edda5c20eda7cbe966113928909a43f75202610a5e93b9c124668b567cb
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The presence of these links suggests an attempt to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/mjfe2igt3286phgiu49skgmae0/litenokale.pdf In PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ca2fa7d4a---95138474062.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/xitadikifebulifa.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/15821888348.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/zikapufija.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/98048196376.pdfIn PDF document text
    • http://rogersdesignhouse.com/uploads/files/levejexevewarosawib.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/16553225783.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/0s9aptk9ngo4ic3ep751rv19f5/70039192801.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/12089b9ef78f410272f857e1a186859e/76384007332.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/lurukafawewapu.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160888d009bea5---zoropixizoravezipu.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/16968884193.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb57b5d7243---89647919130.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ba2fe7c7d---namivusezeguka.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/fipavetobekile.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160704e7ba41b2---90687505450.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/7ad499ee21176ebf0d9b269a22e861f6/2380934742.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/8fef22837d85419bb8387915964fb9b1/dasobobugeb.pdfIn PDF document text
    • http://billsky.ee/files/file/58274009716.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608649f84b113---fuleron.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/wozopitefilurunazu.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b98a6d6db---jetakudoluledoxi.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/48f10f7ac71f55a8a334dd8ab958d5ec/jinabuwojikudilafem.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/belorobobipatutaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+get+the+relics+in+crash+bandicootPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93B 10868 bytes
SHA-256: 21cc9e9aa4a49021593411fc49dddbe5cc0dfd2bed9b630dc4638bb23e730b67
font_01_sfnt_off00011215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11215 17312 bytes
SHA-256: 6731d5146fc2eaa7e47cb68a8d4628bf61b952c2c3404a2e6638c935501607ed
font_02_sfnt_off00013ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1