Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f14fcf86f65bdd…

MALICIOUS

PDF

79.1 KB Created: 2021-09-19 01:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c9f0c3637576eb6f5525b91e6aa18053 SHA-1: 39e7282e75c72d8a2b63b7ea5b57dfdf68638cef SHA-256: 69f14fcf86f65bddf76dbd494bb2e549a578d57419671d8f855a52ed0ffbc14f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, suggesting it functions as a link farm or phishing lure. The PDF structure and embedded URLs point towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=ios+cast+screen+to+chromecast PDF link annotation
    • http://tieulongcopro.com/luutru/files/gidililezuzisazitomemep.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/46215936415.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/161416e2d7d0a1---xisisegizepulijogo.pdfIn PDF document text
    • http://trongtinpc.com/luutru/files/malogazuwipobebozudases.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/24785075046.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/22290074745.pdfIn PDF document text
    • http://majstrissmt.eu/www-data/file/22775076616.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/poziv.pdfIn PDF document text
    • http://smwiarus.pl/ckfinder/userfiles/files/96884843897.pdfIn PDF document text
    • http://konferencii.org/web/uploads/assets/file/dobifi.pdfIn PDF document text
    • https://easternresources.net/ckfinder/userfiles/files/wilalinimefifimerigezob.pdfIn PDF document text
    • http://fundacjahfg.pl/upload/file/15623960690.pdfIn PDF document text
    • http://torremaggiore.sitmap.it/files/files/5231845161.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/35023094686.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210906045354.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/kiniromelazepunedivig.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/jowatomujavukusa.pdfIn PDF document text
    • http://betonkeritesek.eu/Content/files/mimedavezazuwinakisa.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/10226341741.pdfIn PDF document text
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55636336291.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lawuxafali.pdfIn PDF document text
    • https://defrokatilai.lt/images/files/83675908131.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/96091487373.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_off0000d475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD475 16840 bytes
SHA-256: 0c467d3dc07257d143d8a5f5e59bf66f2964b4451db2701ce578f0ae534a3884
font_01_sfnt_off0000ffb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB3 10308 bytes
SHA-256: eadace0d3c33f1c34e3d7c6724c59e79996f8f63b8eddb38c64f0bba6e66bede
font_02_sfnt_off000116c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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