Malicious PDF — malware analysis report

Static analysis result for SHA-256 1007ceb365ea2858…

MALICIOUS

PDF

83.9 KB Created: 2021-07-13 21:07:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4e03c189b5fbe6b2c925813cd953c483 SHA-1: 8d231400512b87c2f97fa284bce8d596a37dc847 SHA-256: 1007ceb365ea285811190aeb9747c26cd68066b824578141bbb9c793cbd1f8c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure as a link farm on disposable hosting further supports its role in directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=bmi+result+chart PDF link annotation
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/03dcobopsajiu60h722nnv6ioh/66721299250.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/6ha7krs76om18u4e8h922j8blj/67539247487.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/dajadaxulutuwu.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/h9e75c7tounf7sjsb667lg3t1o/bezigawunozam.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/10917608679.pdfIn PDF document text
    • http://inistor.com/ufiles/files/89096470966.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16088382b7f267---30347860019.pdfIn PDF document text
    • https://x-software.cz/data/file/85747085831.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb670d9696---68683069216.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089403d1e00c---4376515774.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/mefakovakovowe.pdfIn PDF document text
    • http://beymersan.org/upload/files/87908579523.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16092594fd3c02---guwoperagiwaxizomenaw.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/78taip3gc6ctvacu6uqjqqose7/witedokanaserogome.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/eac6e5e00d468a429e85dc5156c4c15a/gabaxomexodor.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/14311283825.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16097250226d82---3406817914.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/bim4vshuppacgpchlqepsi9hgc/kurunopiku.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/4b3f6e5dbcee871d96fa9a3fffb5b866/nikiluzi.pdfIn PDF document text
    • http://physocare.com/Images_upload/files/38570756874.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/gqm5uic2fg08sntlh7dsveurs1/gegukisor.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/wanivoseb.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/4735ee72b92b7019a33a42c8703bab2f/ruwitodubij.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10084 10424 bytes
SHA-256: c43be95d2eb28728bb221edabfce29a56f6d88f68331a26e01943a0df2d296f3
font_02_sfnt_off00011826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11826 16560 bytes
SHA-256: 5842605ba88b6251a329ac81a62c5398bba30e26f753ae6bcb4a224d8c593bd0

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