Malicious PDF — malware analysis report

Static analysis result for SHA-256 31266a59be4a6ca0…

MALICIOUS

PDF

83.1 KB Created: 2021-09-18 15:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3aa8fe9bcf31a068dc0555287771177e SHA-1: 10d5f79be532c72a1cdc1c314c9e850b1c731def SHA-256: 31266a59be4a6ca0025ae32c7f36ae80edc46251dabcd70ae131a50173bf795e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple domains, including a compromised WordPress site. The embedded URLs suggest an attempt to manipulate search engine results or lead users to phishing or malware hosting sites. No scripts were extracted, but the PDF structure and URL patterns are consistent with phishing or content-luring campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eee59f21fc---zoferazajes.pdf In PDF document text
    • http://dobre-jaja.com/Upload/file/72697930543.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/misomin.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/f6f721847f5fb242d65ebc12c64dae2e/37443727211.pdfIn PDF document text
    • https://0922.sproname.com/files/userfiles/files/18436691391.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/wafusufasok.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/vakazivonimanikuwesisa.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131385b02b55---jepomupipadipi.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/93516774269.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133fe2cd55c3---31141023557.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/e8f786709d3470399308a385b143f5b5/19843320406.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/89156742877.pdfIn PDF document text
    • https://almentispharma.com/ckfinder/userfiles/files/pamimiviferosamumite.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614045606edc0---54064641368.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/8661816472.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/mudexemolefaterefu.pdfIn PDF document text
    • http://jutaek.humenia.com/upload/userfiles/2021/09/files/210913091625.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613e3e63d054e---pelonebopokevuluv.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/vukabadore.pdfIn PDF document text
    • https://ventadeterrenosurbanos.com/userfiles/file/lumubexafamijepokomapu.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/78029052920.pdfIn PDF document text
    • http://tk-weld.com/images/library/File/nuxekizobixatovorinitote.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=stock+car+racing+hack+modPDF 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_off0000e1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A2 17412 bytes
SHA-256: 850fcdf0f43480fa9adabe4659052724230ae19e71a529083f572657435dcecb
font_01_sfnt_off00010f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12762 10636 bytes
SHA-256: b135e74d291e6858c199d564453ee9dada5bb258df1041ad6aba450a97a51ab5

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