Malicious PDF — malware analysis report

Static analysis result for SHA-256 aacafef7df4e85b3…

MALICIOUS

PDF

80.7 KB Created: 2021-02-09 15:35:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fb67200a3ed15e5a19025e3bd1b19de2 SHA-1: 39835d1bcb5029bfd2252d13c60e7a106a23eec7 SHA-256: aacafef7df4e85b3fc8ebe4be84aa35177849fae68b20d9bf65b09a15c34090b
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/123?utm_term=cad+tv+channel+guide PDF link annotation
    • http://zoluvukabufe.iblogger.org/angular_6_formdata_append_not_working.pdfIn PDF document text
    • https://losewilim.weebly.com/uploads/1/3/4/8/134854933/fotosoganut.pdfIn PDF document text
    • https://cdn.sqhk.co/fakodozug/hdahgjc/91736334449.pdfIn PDF document text
    • https://cdn.sqhk.co/tusadopovet/iaEEtha/nukajoj.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/jbSTQBK/vujogakerarupagatamamuta.pdfIn PDF document text
    • https://cdn.sqhk.co/nujorazaje/d0nx0m2/real_basketball_games_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosenijosu/hqFvhip/brain_test_tricky_puzzles_online.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/jgeehcM/acellus_homeschool_app.pdfIn PDF document text
    • https://cdn.sqhk.co/fafujedajir/kjhAggL/vexoxejamovirazijobe.pdfIn PDF document text
    • https://cdn.sqhk.co/jawubibegeba/EhahfOx/bufelafumapiginumi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vonanovab.epizy.com/21371908517.pdfIn PDF document text
    • http://purubonosarule.rf.gd/sugasezolo.pdfIn PDF document text
    • http://dekutob.epizy.com/66027318145.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/american_dictionary_pronunciation_guide.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF91 4892 bytes
SHA-256: 563dced4ccd30eae8562a62cecc7b845c85ad1441fad78aa5a0628176b8a5148
font_01_sfnt_off0001103e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1103E 11320 bytes
SHA-256: b017ac20b0a906f7ab809179cdfeb1589c210d2495b694fe2a88b94e185ad257

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