Malicious PDF — malware analysis report

Static analysis result for SHA-256 b469c0cd9923c18c…

MALICIOUS

PDF

99.6 KB Created: 2021-07-18 10:32:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 3703e1d04413a3079f90dd7af5702f98 SHA-1: baacd4939cba326245d28df1398c5522b2bcb401 SHA-256: b469c0cd9923c18cef6f6153723be587cff2bc6e314d1caa3fecb1717bbd38a0
164 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. The presence of multiple links pointing to compromised CMS upload storage and disposable hosting, combined with a "download button" heuristic, suggests this PDF is designed to trick users into downloading further malicious content. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9704

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e71ece268---2262390838.pdf In PDF document text
    • http://samsung-service-center.ru/uploads/files/fegedesetolawiwuli.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807b85d0d07---62226863711.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/dfc69bf7b8a094c963f499af154782fd/dulivoxitemosud.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/65287113879.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16073750a1bcd8---vuvekateporasemovivuti.pdfIn PDF document text
    • http://ballstonfamilymedicine.com/clients/861402/File/mijomaja.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cab46446c7---85634945611.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607380b85846b---gezujo.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/mv6bm58g41rcbho14dpvnqd2ad/14116183544.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f846bab5c---sonibub.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f17a13023---farowujikek.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/parewigi.pdfIn PDF document text
    • http://rosswellbulldogs.com/clients/b/be/bee1e50a814ad4ba40998340b8964064/File/vowovuxiwodonosonatodot.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/puwiwibezutaf.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/xufefipavutorax.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2dacfe750c---74382601836.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/21058713389.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/a021854708c91148a7d26ffa58f89c14/19446290887.pdfIn PDF document text
    • http://igorodstore.ru/files/userfiles/files/55991237684.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/befelolugofumugus.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/93060111030.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/34709bda6d2e306b7160ff43e178c818/47536381026.pdfIn PDF document text
    • https://hotellemaritime.com/hotel/upload/files/85316669757.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/0d8af952f5de6928f65963acfba8ccb9/bekadebap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=jee+paper+solution+2020PDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/ef580a55bac80b3c91738a8b9e3aaddc/lubumo.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_off0001073f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073F 16112 bytes
SHA-256: 6c8952d211fe43717d1a6d9ff89f86623c95d7ea41717a5de2cb41fb9036af0d
font_01_sfnt_off00011c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C99 18748 bytes
SHA-256: acab0a80d933bf62856861b36268b75d6f65ed174c64dad70e47d0b7f3bdb8ea
font_02_sfnt_off00014ec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000166db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166DB 10580 bytes
SHA-256: 1a4a14c62b15f4ab4141b4c87f034786660edd18b0d34a5785707b6f326571d5

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