Malicious PDF — malware analysis report

Static analysis result for SHA-256 14aa4c9fb10838c0…

MALICIOUS

PDF

87.3 KB Created: 2021-09-01 04:22:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 73e266131abc648a43130f4456a30e72 SHA-1: 4df64062e28ce849a92de3f609406ab0132c137e SHA-256: 14aa4c9fb10838c03ab2b7467c0c9298b7aa8af60b8bd4346ad1f5ff139fb95f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains a link farm with numerous URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting. The presence of these links suggests an attempt to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://datavincity.com/uploads/ckfinder/files/21607006257.pdf In PDF document text
    • http://nsk-nalogov.net/upload/files/90792677544.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/84039619189.pdfIn PDF document text
    • https://dafelia.com/files/59935958619.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/wejakinagob.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/oecdsr9q3ot8b5p61mlan5h7ds/gabibutujetobezetetaf.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/porijivolexavagufe.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/t6tepsgj71odbgc82of29hmpo0/52115194512.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/zemubotanedixi.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/24577685892.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c26f1726b00---216113241.pdfIn PDF document text
    • http://hud101.vn/webroot/img/posts/files/nivebuxitetabikuvides.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/vepavufugi.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875a6a67044---xoxatijofuzomadomur.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/sokopudugurinigogeba.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16108d885a5372---31844910682.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/32805872802.pdfIn PDF document text
    • https://fotoprint.lv/downloads/file/ronanupi.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/ca87708b47c4ba18f8230c6afe463602/lepeturilikamiduxexat.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/ffd3b4a61bbe2c5bdac98a7054cc761c/77844579365.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/guponaj.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/8231288962.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=best+free+editing+software+for+pc+without+watermarkPDF link annotation
    • 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_off0000ef1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1D 17704 bytes
SHA-256: f82ae89cc1603b97700dfb814bc27cb4a8bbc9f9f222e9f6dd5bf427657f3de4
font_01_sfnt_off00011cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000134d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134D0 11352 bytes
SHA-256: ce2aed815476291d8b115a7cab8c91848cbf9f0ca9371db931a7a1c685150389

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