Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ba22d73d1a92fc…

MALICIOUS

PDF

81.2 KB Created: 2021-09-19 02:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5dbdd0fca6ec2b224f2e2b4702a275a1 SHA-1: cad416301d4c16b6454ca40de9dccc69146619e5 SHA-256: d3ba22d73d1a92fca8c4224533646b9e8d34df3a82c41de5de204f594b161468
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a high number of embedded links pointing to various domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are characteristic of phishing lures or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maremio.ru/admin/ckfinder/userfiles/files/xunenudolovevasumuzunora.pdf In PDF document text
    • http://fygl.net/uploads/file/051808207833.pdfIn PDF document text
    • https://webrekruit.com/php_codes/Scott/VieauAssociates/code/userfiles/file/jipugapu.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user//file/_0168328001631526734.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/87052630964.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/jenogunot.pdfIn PDF document text
    • https://gemicilojistik.com/userfiles/upload/file/woxajibejugudise.pdfIn PDF document text
    • http://budka39.ru/files/babusisulojelet.pdfIn PDF document text
    • http://360global.ca/userfiles/file/80856521931.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cb646a2ac3cdede514fa8700faee3325/90854063299.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/vopiwovevinetuxepiwirideb.pdfIn PDF document text
    • https://olamare.com/img/uploaded/file/55096814161.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/1603361970.pdfIn PDF document text
    • http://karcannakliyat.com/userfiles/file/dafedebukodilesejifitar.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/20485646091.pdfIn PDF document text
    • https://costarica4d.com/contents/files/wadibaz.pdfIn PDF document text
    • https://prcomponents.com/ckfinder/userfiles/files/72550379715.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/jukagoluvumosuliwipe.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16134335615d2d---36941650370.pdfIn PDF document text
    • https://full-flavors.com/img/Data/file/32070973355.pdfIn PDF document text
    • https://basundharamart.com/userfiles/file/28542447877.pdfIn PDF document text
    • https://es21sys.com/userfiles/file/65306283377.pdfIn PDF document text
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/51089957610.pdfIn PDF document text
    • https://psihodesk.ro/ckfinder/userfiles/files/litel.pdfIn PDF document text
    • http://byecook.com/ckupload/files/57636438652.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/nazugilujudosazobivamik.pdfIn PDF document text
    • https://buonoantonio.it/userfiles/file/xewagibesidip.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/70839370486.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+do+you+earn+robux+from+gamesPDF 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_off0000d9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A0 16900 bytes
SHA-256: 137f5df96255055fa77f98855b33a6b6610e81a1b1bc58356d7abfcda27f3522
font_01_sfnt_off00010565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10565 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7C 10996 bytes
SHA-256: 2b01a4989ce0d72f697b236532798587b4308423ab7dfcff8f08a97eb9fce21b