Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbdb840d2735ed8d…

MALICIOUS

PDF

66.3 KB Created: 2021-01-11 15:55:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 88f97eb68f98f95308f2b79d3ed0cc19 SHA-1: bf16eae17ce8c55ecc1b7c5af296c0913656da46 SHA-256: dbdb840d2735ed8d607232ceae2699e057ffe4f9744a1c94a714454c1ddd5c14
214 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a critical finding for a malicious redirector link and a link farm. The embedded URL points to a known malicious redirector, which is likely intended to phish credentials or deliver a second-stage payload. The ML classifier also strongly flagged this PDF as malicious.

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
  • 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://traffmen.ru/123?utm_term=jumbo+playing+cards+target In PDF document text
    • https://cdn-cms.f-static.net/uploads/4470408/normal_5fb33dbc4fbd9.pdfIn PDF document text
    • https://cdn.sqhk.co/lisesemafo/hu8nhjm/35863023722.pdfIn PDF document text
    • https://cdn.sqhk.co/samivegin/ewAdjjT/napifaxakomevawam.pdfIn PDF document text
    • https://cdn.sqhk.co/zixemoliz/gdghhhM/dune_quotes_fear.pdfIn PDF document text
    • https://sekojeti.weebly.com/uploads/1/3/4/5/134583019/52c9ecf.pdfIn PDF document text
    • https://cdn.sqhk.co/nazopekujavi/UOPkJTq/xividage.pdfIn PDF document text
    • https://cdn.sqhk.co/dojopaxitovi/mKjgxTU/26584703217.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lodazojamuva/android_to_motorola_one_vision.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/abstract_meaning_in_research_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/chemistry_olympiad_exam_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/titoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/best_bike_gps_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/cheat_droid_no_root_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/gumifakuwujena.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA23 5508 bytes
SHA-256: cfc83e6ed80efb7952e1f7ad2adc7fda9f6613b42a6938490707d4db62c9d1c0
font_01_sfnt_off0000ccb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB6 9764 bytes
SHA-256: d8388e58640330d76436dafa90fe089297b074875b44ee255634f8079acbb75f
font_02_sfnt_off0000ee37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE37 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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