Malicious PDF — malware analysis report

Static analysis result for SHA-256 99253304b109062a…

MALICIOUS

PDF

74.2 KB Created: 2021-02-20 03:17:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: bda5350f3b9fc654813af5b89aafd298 SHA-1: 4ba56acb9810813d67333da0db88f8f301176101 SHA-256: 99253304b109062a6376936aad0769918997540daaab48b27e10a3fcdc930fa0
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though obfuscated, contains keywords that could be used as lures to disguise the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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/wix?keyword=rosa+parks+images+to+draw In PDF document text
    • http://teagreen.space/tidewagemowaru9lnox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391621/normal_5ff303656bc90.pdfIn PDF document text
    • http://stonersfranchise.com/love_breakup_video_songs_teluguv09ql.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478932/normal_5fe3a14a9c20c.pdfIn PDF document text
    • http://zhigina.ru/59483269023sljp9.pdfIn PDF document text
    • https://fovojewonot.weebly.com/uploads/1/3/4/6/134669065/3138052.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/datasheets_for_datasets.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/14659503230.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/ganpati_aarti_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/beginner_jazz_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/hypertension_guidelines_2019_jnc_8.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/articles_exercises_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/cerita_rakyat_adalah.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_off0000e5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C1 5408 bytes
SHA-256: e0623eafdad47796264cd51b9d31f7f5fe73dfc3e9b9723cbfcf4ec20eed50bd
font_01_sfnt_off0000f82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82B 10428 bytes
SHA-256: 6f5cffbbdb00a474055c8a7aceca2e18ea03df8f8c47620d0cb436dfef346119

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