Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ccea30e2ff4384…

MALICIOUS

PDF

69.4 KB Created: 2021-09-12 02:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 65300cbd440bd9abf5ed8b6d0d6e883d SHA-1: c9aee2ea2dcf269af09b4912ab87abc27b6fc3a1 SHA-256: e6ccea30e2ff438443db93ccb898aa478c0e99381ad1ab08b6893ebdf665529a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a likely phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://queure.ru/uplcv?utm_term=kawaks+arcade+emulator+apk+download PDF link annotation
    • https://littleedupark.com/ckfinder/userfiles/files/92919893630.pdfIn PDF document text
    • https://stpm-sa.com/userfiles/file/dagun.pdfIn PDF document text
    • https://gkia.org/kingkong/userfiles/files/76815882343.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/96732329294.pdfIn PDF document text
    • http://jingkangchem.com/upload/files/tabufazujativiselaki.pdfIn PDF document text
    • http://bronia.org/userfiles/file/fukodenore.pdfIn PDF document text
    • http://harc-ias.vn/Images_upload/files/74606647438.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/jubelogorepovowodumov.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/metatemozis.pdfIn PDF document text
    • https://newsale.linyn.mobi/upload/ckeditor/pages/files/jerowigovuwagaxosanosusa.pdfIn PDF document text
    • https://ganganagardentist.com/userfiles/file/letagebopomo.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/55506429886.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/bosojuromubelovo.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/36800746209.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/42769580935.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137888a1c95d---50329576252.pdfIn PDF document text
    • http://malabarisproducoes.com/arquivos/files/vogixuvedabunopivebofuwup.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/fijowekiloxinoxake.pdfIn PDF document text
    • http://longbeach.ilovepokebar.com/uploads/files/tarekuruf.pdfIn PDF document text
    • https://chasehr.in/userfiles/file/96232985973.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/13039020861.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1613d22ee949db---tozenadezufasijavogivak.pdfIn PDF document text
    • http://balashixa.inhome360.ru/admin/ckfinder/userfiles/files/sopixukiti.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/dunojiz.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_off0000afdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDC 15352 bytes
SHA-256: 93a66976b9f788ab7f74128aee810d583f63dec6df933eabc08ef685a624d90a
font_01_sfnt_off0000d693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD693 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eeaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAA 10852 bytes
SHA-256: 2b879f6b1a89ba1f5cde52d8378427e3658eaea7a5d71316641292adda480599