Malicious PDF — malware analysis report

Static analysis result for SHA-256 a64b807f24e358c2…

MALICIOUS

PDF

86.2 KB Created: 2021-08-13 13:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2fd528d7354eca360d16dc10a6e71de8 SHA-1: c11727891e7f4b251f5b43212b58d94d816386b6 SHA-256: a64b807f24e358c24d154d0dc09eaf15ed040ac2c82a0e86c5bb58092ed91476
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs pointing to compromised WordPress uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URI links further supports the attack pattern of luring users to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pistant.ru/uplcv?utm_term=how+to+get+rid+of+double+vision+in+binoculars PDF link annotation
    • http://uniroll.pl/user_images/file/puvaruluzusofefixerovod.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/6626ff31b1337a637d4270077ce32ea7/ruxanugepuxelojowofijunit.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/848ba2e2a8f3c1cf037538803b55e303/19593264488.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/74865800371.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a5fc8264c0d145d12e9a6c67845e43b8/15957791923.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/logunizejot.pdfIn PDF document text
    • https://securitydm.com/slicice/file/95659578352.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fb83b98ceba---73394762366.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/23190424001.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/50962686051.pdfIn PDF document text
    • http://bruntpratcher.com/clients/4/41/419cf983043b9371e8393ecf97d676f7/File/tudoxonunuke.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/ida1mj7thp46ipg7qbv62v266b/sitonoguluduzep.pdfIn PDF document text
    • https://matteagianotti.ch/userfiles/files/3452554520.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a66da87987d---ralorumetabukometapix.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/gugoliduzegoziweludikib.pdfIn PDF document text
    • http://vrtaspol.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/23481427289.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160763330b36a8---figalede.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cacf0c764a3---37792194361.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd00ae8f4cd---wumufumukefedofagavupira.pdfIn PDF document text
    • http://cwesp.biz/upload/file/96338092334.pdfIn PDF document text
    • https://lifetides.ca/cambridge/uploads/files/vimefaro.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/62745e956fb01b49fd5924ebe1730eee/wesumolipitites.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/f623aa03aaf494a99b28d580c1e2d709/budezoje.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/tuxuvilivitiledoxokut.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/83321193664.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_off0000ece6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE6 17508 bytes
SHA-256: a55a19ca0be6dc00db4c9c1dbe96002a63a9378b7fbefc4c2bb2b24a8a9314e9
font_01_sfnt_off0001191d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191D 11036 bytes
SHA-256: f549701655368a0cc820a157c017876e8c1e563d6b154af8dfdf719e7a4820a3
font_02_sfnt_off000132c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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