Malicious PDF — malware analysis report

Static analysis result for SHA-256 f82ff270e9984a43…

MALICIOUS

PDF

69.2 KB Created: 2021-09-09 06:38:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 391e4b87c93c455f4b835043dcaf07e2 SHA-1: 9e2ddca9ff0a501c2c7f2ae56523b91fba83034a SHA-256: f82ff270e9984a438d657baf80a0c6ae77396a2287f54879e1f1770e3aa5fbdd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to various disposable hosting sites, suggesting a phishing or malware distribution attempt. The presence of embedded URIs and the structure of the PDF indicate it's designed to redirect users to external, potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://desushibar.com/userfiles/file/sedokekunijogajoxox.pdf In PDF document text
    • http://www.examnotice.in/uploads/files/dusamajufolekan.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/161319f2678931---70873317373.pdfIn PDF document text
    • http://farmandari-sarvestan.ir/images/news/files/gisunagemigipuxofol.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/pujakigafidigon.pdfIn PDF document text
    • http://xahuaheng.cn/userfiles/file/29980261346.pdfIn PDF document text
    • https://cultureresortpokhara.com/assets/userfiles/files/91012616823.pdfIn PDF document text
    • http://abhinavabhishad.org/userfiles/file/21467933378.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/rulidewapozugumij.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcbdee8a0f---31418647819.pdfIn PDF document text
    • http://nincity.de/inline/file/64323813315.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/dff9ff35c447f4f966a08f926572b762/35787236792.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/lavesatopijugikajulejizi.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/40087303778.pdfIn PDF document text
    • http://www.rsvpcatering-ar.com/files/imagesfile/godeteruxixigidi.pdfIn PDF document text
    • https://geelaboba.dswip.com/ci/userfiles/files/juxixegopogosadegajoda.pdfIn PDF document text
    • http://gtlfuelmarine.com/userfiles/file/dokovu.pdfIn PDF document text
    • https://www.natursany.com/ckfinder/userfiles/files/11870586180.pdfIn PDF document text
    • http://dhleisure.com/ckupload/files/56967628518.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/logezenaxijuvufid.pdfIn PDF document text
    • http://klm-co.ru/foto/ck/files/92209602654.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/56717437551.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/15832488451.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=cartoon+wars+2+unlimited+moneyPDF 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_off0000afbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D4 10860 bytes
SHA-256: 1eb4498444f5dcb9bd920d3e8907e1c8ff73b1acdbebfcbadd65703f4b270e77
font_02_sfnt_off0000e109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE109 15188 bytes
SHA-256: 26df2cb274020a5df1d18107dbc8900ec90e79486dcfc48ddb2843246a6e45ef