Malicious PDF — malware analysis report

Static analysis result for SHA-256 75121499380d2524…

MALICIOUS

PDF

90.6 KB Created: 2021-08-04 06:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fe57afc98cfaaf10503c0726323f6c60 SHA-1: dbf19e6d92ab53db00fca014a93b755bbe6c8bb9 SHA-256: 75121499380d2524c5444938ccbbaeb2c1f7fb46878aedf375c3eaffd44bf650
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The embedded URLs and the nature of the heuristics suggest an attempt to lead users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://warungmimpishio2.com/contents//files/13976257962.pdf In PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ad846302a---16232025859.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16086818bd7e44---63742245137.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/85310927989.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/pejp3p0ktk890sd32tad52hqcb/12283112821.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/49736922a8a6575e83feca2dad15872d/dafoxaxijavaseduzapawed.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e3a6318d2---78921016091.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/dolatabidujukumakozefo.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/45f4b8606b9be0ac3f833edb7ffdc09e/54200578684.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/92489512727.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/ne6topb3a6j4golqmeni62evla/vidizoxugusinopuxewurur.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/kabemugegugedipivogukonot.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/67401180be393458d14b51d173346dd5/70482734231.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/kojevinadufapiti.pdfIn PDF document text
    • http://piecco.eu/upload/files/10840613129.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160955b7e9d2ca---puxatefuperosevasu.pdfIn PDF document text
    • http://udelimpa.es/ckfinder/userfiles/files/59285572400.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/filuramabuxewutona.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/25647925491.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/s4qnfkk8fnhjgkbf9a6spje774/dufawilimaxarupevevilep.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ps87l0uh40kbka8ie4425ocs60/toleg.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/lalijulimanano.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/xuvolubajituvagarekaduz.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa7684be3d---92049289212.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+much+do+10000+robux+cost+ukPDF 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_off0000fb52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB52 10784 bytes
SHA-256: 2cac62f5dd62bac1fce2e8a39f45f263ab3c46bf348ff6b05ce9e45b6e48a582
font_01_sfnt_off00011435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11435 17540 bytes
SHA-256: 2494ca80271d9cbdc4d32caec188ec4fc5f35fb9b58e1d97539c030795ba54a7
font_02_sfnt_off0001422c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1422C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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