Malicious PDF — malware analysis report

Static analysis result for SHA-256 b064eba0a9c6f920…

MALICIOUS

PDF

75.8 KB Created: 2021-09-11 17:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7815c0b96a3c1a5e3ac7434b3b6dabfe SHA-1: 8546e3fcb3e47f57e28925bf5c85d7cb8a61128f SHA-256: b064eba0a9c6f9209af83b10fd674e25570f79d34fc9efc4940a7ee70d28308e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, flagged by ML classifiers and ClamAV as malicious. It includes numerous external URIs, with one specifically pointing to a URL containing 'movies app for android tv' and another being a link farm on disposable hosting. The presence of embedded JavaScript suggests an attempt to execute malicious code, likely to redirect the user to phishing sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=movies+app+for+android+tv PDF link annotation
    • http://thingsantiquesla.com/userfiles/files/xawalijipananufut.pdfIn PDF document text
    • https://huangs.tw/uploads/files/202109080519331722.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/35152654728.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/97261088680.pdfIn PDF document text
    • https://extremedriveline.com/ckfinder/userfiles/files/75426299111.pdfIn PDF document text
    • https://rentcar888.com/uploads/files/202109090424034312.pdfIn PDF document text
    • https://emartdeko.pl/galeria/file/22550753481.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/66256477284.pdfIn PDF document text
    • http://ccsilver.kr/files/fckeditor/file/53334673561362d11c1490.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/82935675975.pdfIn PDF document text
    • http://zeshengtecphar.com/UploadFiles/FCKeditor/20210905155138.pdfIn PDF document text
    • http://shriramashramssschool.org/userfiles/file/xigiviwazedaxazituromixaw.pdfIn PDF document text
    • http://topliving.sk/userfiles/file/20334229501.pdfIn PDF document text
    • http://polenes.cl/userfiles/file/36379728223.pdfIn PDF document text
    • http://shesob.com/file/files/34984399470.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/samubinibe.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///xozix.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/36999070248.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/62642078598.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/vodefumuzesadadatidotilim.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/15671912888.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/wikis.pdfIn PDF document text
    • http://infinity-c-t.com/userfiles/file/basixipikiribagika.pdfIn PDF document text
    • http://puebloexec.com/userfiles/file/lupow.pdfIn PDF document text
    • http://hodori247.com/uploads/files/mofutisevekajuv.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/68249962917.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_off0000c6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C2 10504 bytes
SHA-256: 62b059352be4f7750f3f21c8ed5168fabb8d9a468d6292d673b2028f33353a25
font_01_sfnt_off0000ded4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED4 16436 bytes
SHA-256: b4d5d2a5f3f6806416fa3879b04859a70f72559643aac90498b40656852e85b2
font_02_sfnt_off00010939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10939 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1