Malicious PDF — malware analysis report

Static analysis result for SHA-256 7033e6faddf13a40…

MALICIOUS

PDF

106.2 KB Created: 2021-09-03 23:19:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c0d24cb48aba1424ab446c476cee5fba SHA-1: d675e5ff8c79598f26562e96b94ec551d5c16d83 SHA-256: 7033e6faddf13a40bb6c9e10bc6be22db2205c5aaa3809ff4f43d67cd19bcf2a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs pointing to compromised websites and disposable hosting, indicative of a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The heuristic firings confirm the presence of external URIs and link farms on compromised CMS uploads, supporting the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9877

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://allytemp.ru/uplcv?utm_term=solsticio+de+verano+masoneria+pdf PDF link annotation
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/cb930e76ce0c8eed1859a33b4fef61c0/88248815671.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfa632e4a70---56726180690.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/fa1a2668d2f6b98cadcf9de6234558c8/66140824921.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/21692178959.pdfIn PDF document text
    • http://doanekeyes.com/userfiles/docs/ligesawoxumikipobov.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/2eba5355fe9379a1080e2e17cec19e5d/96474173701.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608d792435c3e---didokedof.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/86d4d20eadb9d0a6774e89cd6cc74719/wivoki.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/45959911197.pdfIn PDF document text
    • https://digireg.org/upload/maxofu.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a53be3ddc63---rozefuwux.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161183b443e6bd---79511735138.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/78347795905.pdfIn PDF document text
    • https://maturana.cl/upload/file/vofiwekakigoraruw.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0b991b87c---58895251610.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e11e64332---tezatusidomuzegumolomu.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/23888631574.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612c82620540b---28610937722.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/03e9a78c24084be8e29d9f072b13cce2/sogisunirurenefumunonofex.pdfIn PDF document text
    • https://daiichigroup.net/uploads/news_file/40749422839.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/e60a48a091bd45f3ee5c57b483d73f28/sulevasazenik.pdfIn PDF document text
    • https://monyetmesum.com/contents//files/wiwojonukikimi.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/sb14uavusd4ldg3bebhd0kcl41/58150696444.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/a1nkete06u6c68415g9vnu2ad2/jofatowejowifunopezimu.pdfIn PDF document text
    • https://vpmemorial.net/images/file/50275946004.pdfIn PDF document text
    • http://seghers.kr/data/editor/file/880750317611f971c86f4a.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_off0001328f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328F 21476 bytes
SHA-256: 565a150e6684f625365f6ad87ba59313318195e7b8294013ca9f683573f8c221
font_01_sfnt_off00016956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16956 10924 bytes
SHA-256: 2ebf9fd05d2df7cba70a394dc03bcda39f46f24091b34ce144fd6e93713a07ab
font_02_sfnt_off0001829b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1829B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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