Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3eeb0597f0dd761…

MALICIOUS

PDF

90.5 KB Created: 2021-09-02 18:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: fb8df9a86bbed2c793b85ec16c9e68ea SHA-1: ccf9b89195e42abf14c7fb1a22cf99e8a16969c3 SHA-256: e3eeb0597f0dd7611c15f82210707c5f66f41170efcdcfea11a91a1526352071
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9744

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://crewmak.ru/uplcv?utm_term=transportation+problem+journal+pdf PDF link annotation
    • http://stalmost.pl/userfiles/file/donuredokowuxuju.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/55128237989.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/nixanuwomovubegire.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d32f3dc27d---dogiju.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/vutoginabid.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/59267265173.pdfIn PDF document text
    • http://nusbetaja2.com/contents/files/52778096965.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/53376813465.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/72648a61f8ddb54c1247f9a95763b9dc/pipinopejekolefim.pdfIn PDF document text
    • https://dycmc.com/DATA/upload/files/202106290302528154.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/556e8143848db07383acd1157c9d98c0/15095645295.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/24827737846.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/97033065794.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/nobutawoxufejepitoma.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16087e7a02dcbc---63055513704.pdfIn PDF document text
    • http://euro-ex.com/images/blog//file/61632527845.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/2cnrn7k2865jrm7fhvqksa0gf5/rajut.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608662ff8effd---pelabeva.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608d128dd88b8---dipegiso.pdfIn PDF document text
    • http://pitchdecor-construction.com/user_img/files/zanati.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ff5a0251e---52912119125.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/0c4365f234044e77ef10074ffd08a11a/wuzebapigamixap.pdfIn PDF document text
    • http://bakoca.hu/files/file/siwobesidumavaropokokefu.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c115ff3908c---livunapojukulipejise.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc95499ba5f---50887919131.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/30eec7911c778f4b54b40d74de054604/92044569336.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f985.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF985 17268 bytes
SHA-256: 6d68fe1d84e1c25c11eaf614b1cec5f122ce1f9cd19950437d6548be2b9c7f8f
font_00_sfnt_off0000e051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE051 10992 bytes
SHA-256: cdac9c27fae7d5c50c846fd9be8adc4a8b045d79f5fbeae68d5653eccb256e73
font_02_sfnt_off00011344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11344 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B56 18792 bytes
SHA-256: daec5eada6acc4c2390da9e1c7586524cae164d4ce62bf7a7b45d677bc8584ca

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