Malicious PDF — malware analysis report

Static analysis result for SHA-256 562b7249288b6dd2…

MALICIOUS

PDF

84.7 KB Created: 2021-06-20 14:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 41a02c13766a79d9d91d36bc75c4169e SHA-1: d3ee1e4370f83edd2465f266d83d93f39628e951 SHA-256: 562b7249288b6dd2fdc846bcd6f7267b42a0a0eb55381dc99bf6c6f822c6cc8a
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to potentially compromised websites or disposable hosting, suggesting a link farm for phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'download autocad 2013 full crack 64 bit xforce keygen', indicating a lure for illegal software downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://targdenunti.ro/userfiles/file/pugisuzo.pdf In PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/79216073548.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/gagewavapevagax.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c14e364f6e---kebumavimavaxuki.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16075e76ea2b89---90446607036.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7001e34e2---23965835120.pdfIn PDF document text
    • http://axwelindia.com/uploads/varow.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/ci7tq7pon5dqi10dfgmr30abfl/63330254929.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/tarukigevowewuweped.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/83019376976.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/672966325.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607befbe76628---nipalilivururi.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/28cfd2ba2a59614c54e99101e362c404/60953099670.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/94047837026.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=download+autocad+2013+full+crack+64+bit+xforce+keygenPDF 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA37 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off0000eb1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1C 6208 bytes
SHA-256: 7a8433a90c014cf06b02e912c4036b6e801d0be3216b6a50b91b6be85c81cbed
font_02_sfnt_off00010079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10079 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_03_sfnt_off00010907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10907 25952 bytes
SHA-256: 840a2ad611a766f17116dd80205cc6ad342490a988771c70b0220719f2143dc4