Malicious PDF — malware analysis report

Static analysis result for SHA-256 adec360675dcf7de…

MALICIOUS

PDF

89.0 KB Created: 2021-07-02 09:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 60c47f40fe993528667daac10866b4c8 SHA-1: 39ee8d79cfe487ffd20d115e11391b3f9d0bd1a3 SHA-256: adec360675dcf7de08775b655538e0876946d5ea71e1b6dfc59d11b0e478bd3b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs likely serve as lures to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f48a036f8---90198568786.pdf
    • http://sbnjl.com/userfiles/files/32560091036.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/r13scmh9ucqujuf6epvuioqni1/6261524216.pdf
    • http://oilmachineydy.com/d/files/goronusabofewilosegurewes.pdf
    • https://zlatartopalovic.rs//files/tobep.pdf
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/5a519c42126443b8e18ea38dae53f23f/xaxotuvosekuvipetisaxexu.pdf
    • https://giridhareye.org/ckfinder/userfiles/files/5951750833.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/06721qvi4jtcpeqh09bcvc42i6/waroxotoxowebo.pdf
    • http://hnspkjx.com/d/files/gukemokokimabonuna.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/c1493b151da4581949753dc65aaf1d41/23087339382.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070e8b4baea7---57833452271.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b324e97910---gelifimazenarinivoki.pdf
    • http://aihyang.com/userfiles/file/ruvuxuvadolixikaxopa.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16089f9b507708---kunasubigig.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/mpjpqgop6nsn8g9akrcmsenjl7/98071519553.pdf
    • https://duproject.com/uploadEditor/files/xetakekoderoj.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160be737eee926---91723210767.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/bfee6ee6be6ac65334f6d4da6cc92f6a/43000912227.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4afd7d69d6---33044184281.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cd7157d0e---74275560816.pdf
    • https://fcr-fomentoconsumoerenda.com/uploads/files/66423728669.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609847904c076---karopowefolanoseduju.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=work+at+a+pizza+place+game
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f967.bin
3b7370e2fb8d9bab486cdb1868620a9deefaaddea3d562de98c70362598b2455
pdf-font-stream PDF embedded font (sfnt) at offset 0xF967 10592 bytes
font_01_sfnt_off000111b4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x111B4 16792 bytes
font_02_sfnt_off000129c6.bin
6b40c35a17a3ea8e0388e48bbeaee712dfa3947d86e2a1949bcb238f52d36e7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x129C6 17332 bytes