Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9fb3753001b998b…

MALICIOUS

PDF

84.8 KB Created: 2021-07-14 08:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2caf103ebcf76b6eebf00e841fd78bde SHA-1: 105c0d17b5a4a245afc3c8f5fd0a4cbba03b1b47 SHA-256: e9fb3753001b998b3869874e277fa8da62714181b666c9c04674dc7cf57db937
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many of which point to compromised websites or link farms, suggesting a phishing or malware distribution attempt. The PDF structure itself does not contain executable scripts, but the extensive use of external links indicates an intent to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://medvor.ru/uplcv?utm_term=how+to+export+transparent+pdf+in+illustrator PDF link annotation
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/e79454e382b1af7fc1d50235c351465e/59314327423.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/reduboni.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a57115fa4---78844617347.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/sazofivadifagu.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088baf28ebac---85881497448.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/59eeacba433246e9d399f71ba1c4c12b/zobugilawevovimobogal.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/99394125833.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4eda433f0---juselesisufunirano.pdfIn PDF document text
    • https://ilmercatinosottocasa.com/file/zovubenazerite.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/jetijitolitatu.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/t6ngir6autkkq2000daba5vvl6/79845453086.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/db973aafc09748b37f5cbb4822c67e13/pesawedadujikapu.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/f3486d5fe3cdad8c60b88bb8eb25bf0e/jilefofopiwexobivebik.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/49050387973.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210623215904830.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/887add19939bced055ec3483a15506ee/75674900685.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/jaxakarinavubaf.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/93610940381.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e02504baac---33073422462.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/7e3f20f88bd4d52eb3fd445ff5e47260/46534864689.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/8q2f6cbpc00tq65sgf8jnrd0n3/vodeliredaditupuxijipipa.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/jetesomuvi.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/kubukewibema.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_off0000e61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE32 10772 bytes
SHA-256: 691ea5a896bc230e0f9abe2ba2c91e37e2170356729e3b0e9f79b2958c266066
font_02_sfnt_off0001171b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171B 17916 bytes
SHA-256: 0783c429f00f26e1d3ad0873ffa9718c753be1f45d5ddee888f352629100fb6c

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