Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd87a3f1ff3470e…

MALICIOUS

PDF

80.0 KB Created: 2021-09-13 12:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fbb8200b4e2e1c9447ae933bd256421f SHA-1: 8f5b0643c05faafd1115f00386395f6a16d241af SHA-256: 0dd87a3f1ff3470e61caecc59a7b91301c1747b5184ba7c0c1fb1476998fe920
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's purpose is to host numerous links, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://freeware-software-download.de/uploads/editor/file/32938573457.pdf In PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/mufazekeribaxojuwi.pdfIn PDF document text
    • http://modern-pro.ru/files/file/pelevadudokovizi.pdfIn PDF document text
    • http://ekorob.pl/userfiles/file/9214818500.pdfIn PDF document text
    • https://laps.pl/userfiles/file/51680304571.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/98072943491.pdfIn PDF document text
    • http://df-2.de/images/daten/file/sevabipukotatozuvefige.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/91954723256.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9f196f67b---wisix.pdfIn PDF document text
    • https://glaze-metalart.com/upload/files/78172524732.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/jijiriwosonefomipipasupe.pdfIn PDF document text
    • http://thietbibepnhahang.net/media/files/bufumigazazizuxinorarabe.pdfIn PDF document text
    • http://mastervin.ru/files/file/vosagalitozoze.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/wasirikup.pdfIn PDF document text
    • https://bisleriuber.genefied.co/ckfinder/userfiles/files/49497069715.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/regobomed.pdfIn PDF document text
    • http://mkngsp.ru/upload/files/xomonamuzulironu.pdfIn PDF document text
    • http://budka39.ru/files/xatoki.pdfIn PDF document text
    • https://yaofangpeixun.com/upload/files/90732909881.pdfIn PDF document text
    • http://xiangzhuan.tw/upload/files/43925320433.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/17014198289.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/97533447408.pdfIn PDF document text
    • http://rrarental.org/upload/file/ximojebututexaleparuwajaj.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c566f0df57---75876872051.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/fiseni.pdfIn PDF document text
    • https://coluer.ir/documents/file/11248274660.pdfIn PDF document text
    • https://ka-base.no/images_content/file/82296223872.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=what+does+a+factory+reset+do+androidPDF 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_off0000d201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD201 18512 bytes
SHA-256: b69ca85273cc85da30f9292f1199cc4a3ca0b4851cf19f009b269e0f34777dd0
font_01_sfnt_off000101c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C9 10636 bytes
SHA-256: 981d9beb9663d082c77235f25dd9fe418e82d1e83ca6af68715847c551ce4bfb
font_02_sfnt_off00011a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1