Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e9b9baeea8c463…

MALICIOUS

PDF

68.2 KB Created: 2021-09-28 03:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 57b86b72d37b3cd02633850f02e9b72a SHA-1: fc2ddac2c93f122846cb7d0a597b64c6aa542416 SHA-256: f7e9b9baeea8c4635dff5d716370cc608ec133aff2f4155d13661af03fa1e57d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The presence of numerous embedded URLs pointing to external PDFs on unknown domains suggests a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://imosa.asia/uploads/files/202109080127044474.pdf In PDF document text
    • http://adacu.org/userfiles/file/20210912035228.pdfIn PDF document text
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/moniruzobifaxijorekezeni.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/01c551be3dcfae993f63d411fb418ac9/71234002409.pdfIn PDF document text
    • http://maximaviajes.com/FCKfiles/file/fomipipu.pdfIn PDF document text
    • http://sapaelitehotel.com/webroot/img/files/2967545986.pdfIn PDF document text
    • http://ketphatthinh.vn/upload/files/nigadifosibopotigozuf.pdfIn PDF document text
    • https://sieuthimaycafe.vn/uploads/file/41983624960.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16144581cafeb7---pepodejixixenikewela.pdfIn PDF document text
    • https://weldingportal.it/userfiles/file/dilapoputi.pdfIn PDF document text
    • http://ezclasssites.com/var/wwww/dev-ezclasssites-com/data/files/jomusatugagolaxu.pdfIn PDF document text
    • https://gionggiacam.gagiongvitgiong.com/ckfinder/userfiles/files/wusulelijamidiweloted.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/41257300835.pdfIn PDF document text
    • https://kentacademymiango.com/userfiles/file/10610957127.pdfIn PDF document text
    • https://trsoftyazilim.com/genelresimler/file/43529387076.pdfIn PDF document text
    • http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/92038198280.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/79907746831.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20210902_55399ECF67A584E1.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/levorotifidugizekigemi.pdfIn PDF document text
    • https://uroci-kursove.com/userfiles/file/69055120711.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/dujanerojaxefaj.pdfIn PDF document text
    • http://erh-hu.com/userfiles/file/49253761542.pdfIn PDF document text
    • http://cheapstandard.com/uploads/files/duwaxukidawaxetax.pdfIn PDF document text
    • https://laptopserwis.com/app/webroot/media/files/59451426540.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=4+letter+words+hPDF 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_off0000aef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c70d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC70D 10056 bytes
SHA-256: d9de0ed361b280ade0065001e72fb5f20f74c33fd810bf92c5b0bfe542b4a514
font_02_sfnt_off0000dda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA2 14940 bytes
SHA-256: 79bbe4263196b93e8352e85a715be05c7640b1ef6ecda2574e8b85e215b681f2

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