Malicious PDF — malware analysis report

Static analysis result for SHA-256 acdd02f274d2e74e…

MALICIOUS

PDF

86.8 KB Created: 2021-06-30 14:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b873c3fa1e8c7468a2639893ae7ffd06 SHA-1: 9248bfa54d4d1ec2f3e7c6d20fc4e851976211e2 SHA-256: acdd02f274d2e74ea55cbbf90d75085fcf1a0911a6ddb91ad180bd2389841b24
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload directories, suggesting a phishing or redirection scheme. The embedded URLs are the primary indicators of compromise, likely leading to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://insights3.com/wp-content/plugins/super-forms/uploads/php/files/d0e1d977a00940f448efc75cf6d576f8/pasawudogomewaxevidagag.pdf In PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/ce675dc773b9e03cf4166a73246fc1a1/bigibudozilezomuguxikuwik.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089920a2fc6b---geribidana.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077d70fdeeee---lebem.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1e8bb2972---nokalojopegu.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/dipv7uok5753d7rm8l4a7vebm2/pafizudapijaz.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d44e9a9bca---45640641421.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/a0626d3b2c8e88c066476c2d7cf85aa6/wememapumini.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/91456277811.pdfIn PDF document text
    • https://promise-land.com/upload/file/dexawibovulemiluno.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/nafuzeni.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/k033ujfar4899scf86mafuvq94/71523309962.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16097992180e04---mopiwu.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/8qlf22leu8opf4h0di94gf8br4/runujasarivaba.pdfIn PDF document text
    • http://canadanur.com/resimler/files/gebejutolafafelunukutaka.pdfIn PDF document text
    • http://hotechike.com/files/files/4061910965.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/mede7v3cobs6si5havd8851k63/lotujavuxiri.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/buziwawupaxu.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/vaxegajig.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607beebd2f8a4---waremezunuruxa.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/mogovofomonexiwinevomani.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc947bf2a9---dojikikewapikizebav.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af85c1bf9f2---96684295559.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=jules+verne+a+trip+to+the+moonPDF link annotation
    • 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_off0000eeee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10705 10672 bytes
SHA-256: 2acf8777fc2988a40ea7b4a92132eb1945403160943c81e8c2d6a756bb2dea54
font_02_sfnt_off00011f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4F 18112 bytes
SHA-256: e0c6eac916135eacf4c31949c743e43a0bd1f7c14379b57dc2aa5c3cc6cea885

Open this report in the interactive analyzer, or submit your own file for analysis.