Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49a81c3a9eb2298…

MALICIOUS

PDF

90.2 KB Created: 2021-09-16 01:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c558e1c625abd94cb235593f630fdaea SHA-1: bee8b64de3eea77402eb3c046f681ef7608e795d SHA-256: a49a81c3a9eb2298701aaf4e0c97b4a9156bb9d0b35d45e4eea0c0d3dc94952a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting an intent to redirect users to malicious content. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically highlights this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://drafthe.ru/uplcv?utm_term=unlimited+money+gta+5 PDF link annotation
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/9585854730.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/megirimofizunufexezoledi.pdfIn PDF document text
    • http://ubest.ru/images/file/95737613319.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/jodas.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/89341703871.pdfIn PDF document text
    • http://kamakuralosgatos.com/uploads/files/vosulevo.pdfIn PDF document text
    • https://nusamulticentralestari.com/Uploads/userfiles/files/xukiwafurazofewuk.pdfIn PDF document text
    • https://408of53crownstreet.com/assets/media/files/5224364203.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/xalimomireku.pdfIn PDF document text
    • http://quartierdete.fr/uploads/fckeditor/file/16407674398.pdfIn PDF document text
    • https://elemental-ia.com/userfiles/file/pawemisizagobo.pdfIn PDF document text
    • https://www.ventisilva.com.br/ckfinder/userfiles/files/26189044593.pdfIn PDF document text
    • http://jobcred.com/rk/jobcred/uploads/image/file/40793455768.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/kapejilodi.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/26152387433.pdfIn PDF document text
    • https://plantbiochem.com/ckfinder/userfiles/files/deposupajavojozi.pdfIn PDF document text
    • http://krajinar.cz/soubory/files/likafuralemibomovurikoz.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16139df686615d---suvexibaxusu.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141f113ca66a---mitikexidugexo.pdfIn PDF document text
    • https://livnica-metalurg.com/images/pages/file/wijedofiguz.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/telim.pdfIn PDF document text
    • https://etadelloro.it/images/file/21622670167.pdfIn PDF document text
    • https://eastmangroupllc.net/ckfinder/userfiles/files/tedumupa.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_off0000fbcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000113e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E3 10576 bytes
SHA-256: b47a222a7ace49e92a1929b3099cad07569afec2a837790380693b1bd57ce4e6
font_02_sfnt_off00012bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BCB 18484 bytes
SHA-256: c01dfdc3eb1d48ffc87cd87c3400b429adc59d8ce0988ed793fdb7bcc5854619

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