Malicious PDF — malware analysis report

Static analysis result for SHA-256 897e87ebe2392d77…

MALICIOUS

PDF

94.6 KB Created: 2021-09-23 12:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1d4a0837786794604c6e18fde531f785 SHA-1: 992d1b6e1947ad2e40af3d7aa8484b3da1c0f2fd SHA-256: 897e87ebe2392d775255daaa923c9ec57f21d5885459a9c21ef661def51f1e6c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier. It contains numerous external URIs and link farms pointing to potentially compromised websites, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are indicative of a spearphishing attachment, designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://catamma.ru/uplcv?utm_term=best+gunship+games+for+android PDF link annotation
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/ganojub.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/gotusegepabujagubatope.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/92125334575.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/65291403220.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614602594d2f2---31756335736.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/ronuwefelidisajarotuke.pdfIn PDF document text
    • http://www.hussco-steel.com/husscofiles/files/84936127208.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/pivuwanimiwurebedixajub.pdfIn PDF document text
    • http://ahknchem.com/upload/files/53565795651.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210902034619.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ae7a7f8be---45582588138.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16143928575e0e---41025552987.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/gupexusadanutow.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614056dba8c20---26511919909.pdfIn PDF document text
    • https://dichocungtoi.com/userfiles/file/30500014436.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/6ua4fvcug6crtojt4jhgoc8icm/70984216033.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135668434189---75519171755.pdfIn PDF document text
    • http://snabsz.ru/ckfinder/userfiles/files/35376528544.pdfIn PDF document text
    • http://terfigyelokamera.info/files/file/sozom.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/11836117194.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/pigexemizupidaxek.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161387885e3cf6---pojop.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/90475743754.pdfIn PDF document text
    • https://posetili.ru/userfiles/file/81424903837.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/7825991310.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF728 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F39 17192 bytes
SHA-256: 2e4504b280c77841b83e6dc05cfa7d952844e781cf83b00604b4d078bbbabfec
font_02_sfnt_off0001288b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1288B 16532 bytes
SHA-256: 84842d74e997f7004f57bf581eb9045a38c0e95ee387777f4581ec66fedafee6
font_03_sfnt_off0001536d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1536D 11052 bytes
SHA-256: 2dacc8e4c5b4a7f9c0bd33ccc7fed5bfa3ace90990b4e8fbdd363ec6f0383e2f

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