Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b0aeeae77959bb…

MALICIOUS

PDF

92.1 KB Created: 2021-07-22 21:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7966f66529428efed11f2bb88e621cd6 SHA-1: e12ab7b232d45f80363367307e327074dc88e0d9 SHA-256: 82b0aeeae77959bbf15b76dcc9402f462fd137ea40f3b107a7e51b4b5f56e910
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF identified by ClamAV as a phishing trojan. Heuristics indicate it functions as a link farm, pointing to numerous compromised WordPress upload directories and disposable hosting sites. While no scripts were explicitly extracted, the nature of PDF exploits often involves embedded JavaScript to facilitate malicious actions, such as redirecting users to phishing pages or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ceral.pl/ceral/pliki/file/nuduvixeruwefiv.pdf In PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/2a72619d1679ebadfe6278dae120bb26/xobetevilifufetumenofewit.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bbaecf2c543---66792395689.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/zipemisut.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/96evj7arerpo13oeub08ngo786/21560781438.pdfIn PDF document text
    • https://juegosinflablesarizona.com/files/noxilisokameg.pdfIn PDF document text
    • https://local-atlas.ru/userfiles/files/suwutevimotosev.pdfIn PDF document text
    • http://turhantur.com/turhantur/files/kelatilugiv.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16073ab7d02acf---21391803479.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/af774b1e9c948cfc8900a23886ea3519/lutenokatapelowuvaju.pdfIn PDF document text
    • https://qqhanoman.com/contents//files/zezarixepolidegiruw.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/eq64ujo0o6nf7n538pi8tfqt6c/modarumimizup.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/sobatetoparuwajutagel.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c9da7a08c04---devafaxosefuzul.pdfIn PDF document text
    • http://yuc-fac.com/uploadfiles/20210709223133.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609684b093b3b---66554557647.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/megitujonarekipolesuvone.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/tuxanemirediriduro.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609c28301b93c---29796823119.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb384202dfc---janutodemazif.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/92058823738.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/vulowakuvubijajutopemo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=hex+to+inPDF 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_off000102e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E3 9716 bytes
SHA-256: 939eb68c25e34df41c10d1d369bc6d21337769f49f6a4efa9d7e4639c23f02c3
font_01_sfnt_off00011824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11824 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13036 18804 bytes
SHA-256: 48ce806e7722dcb5f6fa46ca8496c855a519dcec759538190cdc9906cb44343b

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