Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2941c3f08e474b8…

MALICIOUS

PDF

71.4 KB Created: 2021-09-28 07:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 69e1aa2256b5c49f7237a953e57f8922 SHA-1: 807abcbb71b63c01b122d10f719f4507216d59f0 SHA-256: d2941c3f08e474b8f1f151837e38ed0ba6f3ef038fb51cc01796e02a7e11cef0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, suggesting it is used to redirect users to phishing sites or download further malicious content. The PDF structure and embedded URLs point towards a phishing or malware distribution campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pixomot.ru/uplcv?utm_term=how+to+identify+prime+and+composite+numbers PDF link annotation
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202109230805442089.pdfIn PDF document text
    • http://worldsocialistpartyindia.org/ckfinder/userfiles/files/ketirifisabugut.pdfIn PDF document text
    • https://taxforce.nl/userfiles/files/80538880479.pdfIn PDF document text
    • http://peak-experience-europe.com/images/blog/file/lasezorekuxuz.pdfIn PDF document text
    • http://fratellibeninca.com/images/file/tixujusomofurawovaju.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/42556584644.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/mevijefososukukat.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/bunapawuvorugivejafexinop.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/89774863341.pdfIn PDF document text
    • https://nulifeus.com/~nulife/userfiles/file/wapuk.pdfIn PDF document text
    • http://sinocelltech.com/filespath/files/20210920173603.pdfIn PDF document text
    • https://desco.scp.hr/files/55308997446.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/fositutumasuguwe.pdfIn PDF document text
    • http://heldermusic.nl/ckfinder/userfiles/files/nuwimanumiv.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/taxiniwunoragajibekaji.pdfIn PDF document text
    • http://ohappy.org/userData/board/file/96824706894.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/modukujovedowimawubupele.pdfIn PDF document text
    • http://xn--aknmedical-yub.com/uploads/file/67739823563.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/32937551811.pdfIn PDF document text
    • http://canvangdientu.com/images/file/simumogitigivasuritexitim.pdfIn PDF document text
    • http://shahnawazonline.com/uploads/files/33499110569.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/zorizexabadizet.pdfIn PDF document text
    • http://vesimport.ru/userfiles/file/dugikozaxutosuwumunub.pdfIn PDF document text
    • https://camphacement.vn/upload/files/nulukimobasasudatafos.pdfIn PDF document text
    • http://icsbc.ru/fuploader/file/rifix.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_off0000b42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB42E 16376 bytes
SHA-256: ff282844d752f49a6cc8a6da556547bad22c2f78c52a3c14be5a421a21fe3096
font_01_sfnt_off0000dd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD68 11168 bytes
SHA-256: 6146ba7ad450e114a6c97706a9d630ace883b178fa2c885b54e43d44b3081758
font_02_sfnt_off0000f756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF756 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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