Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7658deaae79cee…

MALICIOUS

PDF

87.2 KB Created: 2021-08-22 07:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e00b4692d4557548022bef6046ce477f SHA-1: d2430d08c65a51fa1565d8cc8b6a38ab6cb90b0f SHA-256: 0b7658deaae79cee81b9ca2e50a5800ca84d7a31ab4c0b147d862fad368b31b2
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to obscure the final destination. The PDF structure itself appears to be a lure, likely intended to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://sartor.ru/upload/files/dezetaperewuvijeko.pdf In PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/56453265542.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/75vtdmg5s6en8ifvt21s05frm1/mujokevil.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021081620302540.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/25972005657.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d64207cabfc---55300311823.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/fazovexizozapipatanid.pdfIn PDF document text
    • http://nessium.net/userfiles/file/73590323044.pdfIn PDF document text
    • http://thegioixedap.net/upload/files/90845908110.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082e5728334b---48920583927.pdfIn PDF document text
    • http://inspirationforexcellence.com/clients/66491/File/bitopufowixuw.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1f37cfb43---difipogakoxam.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160df5dd798f81---94033133708.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/2c3cac5f5576e5cee197b56074fe509f/48146470897.pdfIn PDF document text
    • http://nissanotogovap.net/uploads/images/files/pekoso.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/ru0s9nebafbojbgkbm0o0htf15/44065363288.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f261fde836---nufojavazexaretoxaropen.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/fexabugodudedupewi.pdfIn PDF document text
    • https://conexkarvan.com/cache/fck_files/file/93537984728.pdfIn PDF document text
    • https://sanidom.pl/img/file/73246529749.pdfIn PDF document text
    • http://wami.cc/data/files/dunonixezimisaduw.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/zezapunesika.pdfIn PDF document text
    • https://studiovizia.com/webroot/img/content/files/timijesimo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=bowmasters+online+pvp+locked+android+phonePDF 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_off0000eea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000106b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B5 17392 bytes
SHA-256: c94c65ce504249cedb327dd0b0e232330e933c6a7e1e8fa3814907bb607bb2ac
font_02_sfnt_off0001347b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1347B 11076 bytes
SHA-256: da189c26347a56e9d35fd66635832dad34b68f0b91ff69e810d05697272f3011

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